Updated Service Worker JS and Added Node Server

Updated the service worker JS. Issue with how I typed the cache links. Forgot to put a "./" before the asset name. Should work now.

node_modules/utils-merge/.npmignore

@@ -0,0 +1,9 @@
+CONTRIBUTING.md
+Makefile
+docs/
+examples/
+reports/
+test/
+
+.jshintrc
+.travis.yml

node_modules/utils-merge/LICENSE

@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2013-2017 Jared Hanson
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/utils-merge/README.md

@@ -0,0 +1,34 @@
+# utils-merge
+
+[![Version](https://img.shields.io/npm/v/utils-merge.svg?label=version)](https://www.npmjs.com/package/utils-merge)
+[![Build](https://img.shields.io/travis/jaredhanson/utils-merge.svg)](https://travis-ci.org/jaredhanson/utils-merge)
+[![Quality](https://img.shields.io/codeclimate/github/jaredhanson/utils-merge.svg?label=quality)](https://codeclimate.com/github/jaredhanson/utils-merge)
+[![Coverage](https://img.shields.io/coveralls/jaredhanson/utils-merge.svg)](https://coveralls.io/r/jaredhanson/utils-merge)
+[![Dependencies](https://img.shields.io/david/jaredhanson/utils-merge.svg)](https://david-dm.org/jaredhanson/utils-merge)
+
+
+Merges the properties from a source object into a destination object.
+
+## Install
+
+```bash
+$ npm install utils-merge
+```
+
+## Usage
+
+```javascript
+var a = { foo: 'bar' }
+  , b = { bar: 'baz' };
+
+merge(a, b);
+// => { foo: 'bar', bar: 'baz' }
+```
+
+## License
+
+[The MIT License](http://opensource.org/licenses/MIT)
+
+Copyright (c) 2013-2017 Jared Hanson <[http://jaredhanson.net/](http://jaredhanson.net/)>
+
+<a target='_blank' rel='nofollow' href='https://app.codesponsor.io/link/vK9dyjRnnWsMzzJTQ57fRJpH/jaredhanson/utils-merge'>  <img alt='Sponsor' width='888' height='68' src='https://app.codesponsor.io/embed/vK9dyjRnnWsMzzJTQ57fRJpH/jaredhanson/utils-merge.svg' /></a>

node_modules/utils-merge/index.js

@@ -0,0 +1,23 @@
+/**
+ * Merge object b with object a.
+ *
+ *     var a = { foo: 'bar' }
+ *       , b = { bar: 'baz' };
+ *
+ *     merge(a, b);
+ *     // => { foo: 'bar', bar: 'baz' }
+ *
+ * @param {Object} a
+ * @param {Object} b
+ * @return {Object}
+ * @api public
+ */
+
+exports = module.exports = function(a, b){
+  if (a && b) {
+    for (var key in b) {
+      a[key] = b[key];
+    }
+  }
+  return a;
+};

node_modules/utils-merge/package.json

@@ -0,0 +1,66 @@
+{
+  "_from": "utils-merge@1.0.1",
+  "_id": "utils-merge@1.0.1",
+  "_inBundle": false,
+  "_integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM=",
+  "_location": "/utils-merge",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "version",
+    "registry": true,
+    "raw": "utils-merge@1.0.1",
+    "name": "utils-merge",
+    "escapedName": "utils-merge",
+    "rawSpec": "1.0.1",
+    "saveSpec": null,
+    "fetchSpec": "1.0.1"
+  },
+  "_requiredBy": [
+    "/express"
+  ],
+  "_resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+  "_shasum": "9f95710f50a267947b2ccc124741c1028427e713",
+  "_spec": "utils-merge@1.0.1",
+  "_where": "/Users/stevenh/Desktop/Side_Projects/What_Are_You_Lifting-App/WhatAreYouLifting/node_modules/express",
+  "author": {
+    "name": "Jared Hanson",
+    "email": "jaredhanson@gmail.com",
+    "url": "http://www.jaredhanson.net/"
+  },
+  "bugs": {
+    "url": "http://github.com/jaredhanson/utils-merge/issues"
+  },
+  "bundleDependencies": false,
+  "dependencies": {},
+  "deprecated": false,
+  "description": "merge() utility function",
+  "devDependencies": {
+    "chai": "1.x.x",
+    "make-node": "0.3.x",
+    "mocha": "1.x.x"
+  },
+  "engines": {
+    "node": ">= 0.4.0"
+  },
+  "homepage": "https://github.com/jaredhanson/utils-merge#readme",
+  "keywords": [
+    "util"
+  ],
+  "license": "MIT",
+  "licenses": [
+    {
+      "type": "MIT",
+      "url": "http://opensource.org/licenses/MIT"
+    }
+  ],
+  "main": "./index",
+  "name": "utils-merge",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/jaredhanson/utils-merge.git"
+  },
+  "scripts": {
+    "test": "mocha --reporter spec --require test/bootstrap/node test/*.test.js"
+  },
+  "version": "1.0.1"
+}

node_modules/vary/HISTORY.md

@@ -0,0 +1,39 @@
+1.1.2 / 2017-09-23
+==================
+
+  * perf: improve header token parsing speed
+
+1.1.1 / 2017-03-20
+==================
+
+  * perf: hoist regular expression
+
+1.1.0 / 2015-09-29
+==================
+
+  * Only accept valid field names in the `field` argument
+    - Ensures the resulting string is a valid HTTP header value
+
+1.0.1 / 2015-07-08
+==================
+
+  * Fix setting empty header from empty `field`
+  * perf: enable strict mode
+  * perf: remove argument reassignments
+
+1.0.0 / 2014-08-10
+==================
+
+  * Accept valid `Vary` header string as `field`
+  * Add `vary.append` for low-level string manipulation
+  * Move to `jshttp` orgainzation
+
+0.1.0 / 2014-06-05
+==================
+
+  * Support array of fields to set
+
+0.0.0 / 2014-06-04
+==================
+
+  * Initial release

node_modules/vary/LICENSE

@@ -0,0 +1,22 @@
+(The MIT License)
+
+Copyright (c) 2014-2017 Douglas Christopher Wilson
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/vary/README.md

@@ -0,0 +1,101 @@
+# vary
+
+[![NPM Version][npm-image]][npm-url]
+[![NPM Downloads][downloads-image]][downloads-url]
+[![Node.js Version][node-version-image]][node-version-url]
+[![Build Status][travis-image]][travis-url]
+[![Test Coverage][coveralls-image]][coveralls-url]
+
+Manipulate the HTTP Vary header
+
+## Installation
+
+This is a [Node.js](https://nodejs.org/en/) module available through the
+[npm registry](https://www.npmjs.com/). Installation is done using the
+[`npm install` command](https://docs.npmjs.com/getting-started/installing-npm-packages-locally): 
+
+```sh
+$ npm install vary
+```
+
+## API
+
+<!-- eslint-disable no-unused-vars -->
+
+```js
+var vary = require('vary')
+```
+
+### vary(res, field)
+
+Adds the given header `field` to the `Vary` response header of `res`.
+This can be a string of a single field, a string of a valid `Vary`
+header, or an array of multiple fields.
+
+This will append the header if not already listed, otherwise leaves
+it listed in the current location.
+
+<!-- eslint-disable no-undef -->
+
+```js
+// Append "Origin" to the Vary header of the response
+vary(res, 'Origin')
+```
+
+### vary.append(header, field)
+
+Adds the given header `field` to the `Vary` response header string `header`.
+This can be a string of a single field, a string of a valid `Vary` header,
+or an array of multiple fields.
+
+This will append the header if not already listed, otherwise leaves
+it listed in the current location. The new header string is returned.
+
+<!-- eslint-disable no-undef -->
+
+```js
+// Get header string appending "Origin" to "Accept, User-Agent"
+vary.append('Accept, User-Agent', 'Origin')
+```
+
+## Examples
+
+### Updating the Vary header when content is based on it
+
+```js
+var http = require('http')
+var vary = require('vary')
+
+http.createServer(function onRequest (req, res) {
+  // about to user-agent sniff
+  vary(res, 'User-Agent')
+
+  var ua = req.headers['user-agent'] || ''
+  var isMobile = /mobi|android|touch|mini/i.test(ua)
+
+  // serve site, depending on isMobile
+  res.setHeader('Content-Type', 'text/html')
+  res.end('You are (probably) ' + (isMobile ? '' : 'not ') + 'a mobile user')
+})
+```
+
+## Testing
+
+```sh
+$ npm test
+```
+
+## License
+
+[MIT](LICENSE)
+
+[npm-image]: https://img.shields.io/npm/v/vary.svg
+[npm-url]: https://npmjs.org/package/vary
+[node-version-image]: https://img.shields.io/node/v/vary.svg
+[node-version-url]: https://nodejs.org/en/download
+[travis-image]: https://img.shields.io/travis/jshttp/vary/master.svg
+[travis-url]: https://travis-ci.org/jshttp/vary
+[coveralls-image]: https://img.shields.io/coveralls/jshttp/vary/master.svg
+[coveralls-url]: https://coveralls.io/r/jshttp/vary
+[downloads-image]: https://img.shields.io/npm/dm/vary.svg
+[downloads-url]: https://npmjs.org/package/vary

node_modules/vary/index.js

@@ -0,0 +1,149 @@
+/*!
+ * vary
+ * Copyright(c) 2014-2017 Douglas Christopher Wilson
+ * MIT Licensed
+ */
+
+'use strict'
+
+/**
+ * Module exports.
+ */
+
+module.exports = vary
+module.exports.append = append
+
+/**
+ * RegExp to match field-name in RFC 7230 sec 3.2
+ *
+ * field-name    = token
+ * token         = 1*tchar
+ * tchar         = "!" / "#" / "$" / "%" / "&" / "'" / "*"
+ *               / "+" / "-" / "." / "^" / "_" / "`" / "|" / "~"
+ *               / DIGIT / ALPHA
+ *               ; any VCHAR, except delimiters
+ */
+
+var FIELD_NAME_REGEXP = /^[!#$%&'*+\-.^_`|~0-9A-Za-z]+$/
+
+/**
+ * Append a field to a vary header.
+ *
+ * @param {String} header
+ * @param {String|Array} field
+ * @return {String}
+ * @public
+ */
+
+function append (header, field) {
+  if (typeof header !== 'string') {
+    throw new TypeError('header argument is required')
+  }
+
+  if (!field) {
+    throw new TypeError('field argument is required')
+  }
+
+  // get fields array
+  var fields = !Array.isArray(field)
+    ? parse(String(field))
+    : field
+
+  // assert on invalid field names
+  for (var j = 0; j < fields.length; j++) {
+    if (!FIELD_NAME_REGEXP.test(fields[j])) {
+      throw new TypeError('field argument contains an invalid header name')
+    }
+  }
+
+  // existing, unspecified vary
+  if (header === '*') {
+    return header
+  }
+
+  // enumerate current values
+  var val = header
+  var vals = parse(header.toLowerCase())
+
+  // unspecified vary
+  if (fields.indexOf('*') !== -1 || vals.indexOf('*') !== -1) {
+    return '*'
+  }
+
+  for (var i = 0; i < fields.length; i++) {
+    var fld = fields[i].toLowerCase()
+
+    // append value (case-preserving)
+    if (vals.indexOf(fld) === -1) {
+      vals.push(fld)
+      val = val
+        ? val + ', ' + fields[i]
+        : fields[i]
+    }
+  }
+
+  return val
+}
+
+/**
+ * Parse a vary header into an array.
+ *
+ * @param {String} header
+ * @return {Array}
+ * @private
+ */
+
+function parse (header) {
+  var end = 0
+  var list = []
+  var start = 0
+
+  // gather tokens
+  for (var i = 0, len = header.length; i < len; i++) {
+    switch (header.charCodeAt(i)) {
+      case 0x20: /*   */
+        if (start === end) {
+          start = end = i + 1
+        }
+        break
+      case 0x2c: /* , */
+        list.push(header.substring(start, end))
+        start = end = i + 1
+        break
+      default:
+        end = i + 1
+        break
+    }
+  }
+
+  // final token
+  list.push(header.substring(start, end))
+
+  return list
+}
+
+/**
+ * Mark that a request is varied on a header field.
+ *
+ * @param {Object} res
+ * @param {String|Array} field
+ * @public
+ */
+
+function vary (res, field) {
+  if (!res || !res.getHeader || !res.setHeader) {
+    // quack quack
+    throw new TypeError('res argument is required')
+  }
+
+  // get existing header
+  var val = res.getHeader('Vary') || ''
+  var header = Array.isArray(val)
+    ? val.join(', ')
+    : String(val)
+
+  // set new header
+  if ((val = append(header, field))) {
+    res.setHeader('Vary', val)
+  }
+}

node_modules/vary/package.json

@@ -0,0 +1,78 @@
+{
+  "_from": "vary@~1.1.2",
+  "_id": "vary@1.1.2",
+  "_inBundle": false,
+  "_integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=",
+  "_location": "/vary",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "range",
+    "registry": true,
+    "raw": "vary@~1.1.2",
+    "name": "vary",
+    "escapedName": "vary",
+    "rawSpec": "~1.1.2",
+    "saveSpec": null,
+    "fetchSpec": "~1.1.2"
+  },
+  "_requiredBy": [
+    "/express"
+  ],
+  "_resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+  "_shasum": "2299f02c6ded30d4a5961b0b9f74524a18f634fc",
+  "_spec": "vary@~1.1.2",
+  "_where": "/Users/stevenh/Desktop/Side_Projects/What_Are_You_Lifting-App/WhatAreYouLifting/node_modules/express",
+  "author": {
+    "name": "Douglas Christopher Wilson",
+    "email": "doug@somethingdoug.com"
+  },
+  "bugs": {
+    "url": "https://github.com/jshttp/vary/issues"
+  },
+  "bundleDependencies": false,
+  "deprecated": false,
+  "description": "Manipulate the HTTP Vary header",
+  "devDependencies": {
+    "beautify-benchmark": "0.2.4",
+    "benchmark": "2.1.4",
+    "eslint": "3.19.0",
+    "eslint-config-standard": "10.2.1",
+    "eslint-plugin-import": "2.7.0",
+    "eslint-plugin-markdown": "1.0.0-beta.6",
+    "eslint-plugin-node": "5.1.1",
+    "eslint-plugin-promise": "3.5.0",
+    "eslint-plugin-standard": "3.0.1",
+    "istanbul": "0.4.5",
+    "mocha": "2.5.3",
+    "supertest": "1.1.0"
+  },
+  "engines": {
+    "node": ">= 0.8"
+  },
+  "files": [
+    "HISTORY.md",
+    "LICENSE",
+    "README.md",
+    "index.js"
+  ],
+  "homepage": "https://github.com/jshttp/vary#readme",
+  "keywords": [
+    "http",
+    "res",
+    "vary"
+  ],
+  "license": "MIT",
+  "name": "vary",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/jshttp/vary.git"
+  },
+  "scripts": {
+    "bench": "node benchmark/index.js",
+    "lint": "eslint --plugin markdown --ext js,md .",
+    "test": "mocha --reporter spec --bail --check-leaks test/",
+    "test-cov": "istanbul cover node_modules/mocha/bin/_mocha -- --reporter dot --check-leaks test/",
+    "test-travis": "istanbul cover node_modules/mocha/bin/_mocha --report lcovonly -- --reporter spec --check-leaks test/"
+  },
+  "version": "1.1.2"
+}

package-lock.json

@@ -0,0 +1,356 @@
+{
+  "requires": true,
+  "lockfileVersion": 1,
+  "dependencies": {
+    "accepts": {
+      "version": "1.3.5",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.5.tgz",
+      "integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=",
+      "requires": {
+        "mime-types": "~2.1.18",
+        "negotiator": "0.6.1"
+      }
+    },
+    "array-flatten": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
+    },
+    "body-parser": {
+      "version": "1.18.3",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.18.3.tgz",
+      "integrity": "sha1-WykhmP/dVTs6DyDe0FkrlWlVyLQ=",
+      "requires": {
+        "bytes": "3.0.0",
+        "content-type": "~1.0.4",
+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "http-errors": "~1.6.3",
+        "iconv-lite": "0.4.23",
+        "on-finished": "~2.3.0",
+        "qs": "6.5.2",
+        "raw-body": "2.3.3",
+        "type-is": "~1.6.16"
+      }
+    },
+    "bytes": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.0.0.tgz",
+      "integrity": "sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg="
+    },
+    "content-disposition": {
+      "version": "0.5.2",
+      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.2.tgz",
+      "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ="
+    },
+    "content-type": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.4.tgz",
+      "integrity": "sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA=="
+    },
+    "cookie": {
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.3.1.tgz",
+      "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s="
+    },
+    "cookie-signature": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
+      "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
+    },
+    "debug": {
+      "version": "2.6.9",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+      "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+      "requires": {
+        "ms": "2.0.0"
+      }
+    },
+    "depd": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.2.tgz",
+      "integrity": "sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak="
+    },
+    "destroy": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/destroy/-/destroy-1.0.4.tgz",
+      "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA="
+    },
+    "ee-first": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/ee-first/-/ee-first-1.1.1.tgz",
+      "integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0="
+    },
+    "encodeurl": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/encodeurl/-/encodeurl-1.0.2.tgz",
+      "integrity": "sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k="
+    },
+    "escape-html": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz",
+      "integrity": "sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg="
+    },
+    "etag": {
+      "version": "1.8.1",
+      "resolved": "https://registry.npmjs.org/etag/-/etag-1.8.1.tgz",
+      "integrity": "sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc="
+    },
+    "express": {
+      "version": "4.16.4",
+      "resolved": "https://registry.npmjs.org/express/-/express-4.16.4.tgz",
+      "integrity": "sha512-j12Uuyb4FMrd/qQAm6uCHAkPtO8FDTRJZBDd5D2KOL2eLaz1yUNdUB/NOIyq0iU4q4cFarsUCrnFDPBcnksuOg==",
+      "requires": {
+        "accepts": "~1.3.5",
+        "array-flatten": "1.1.1",
+        "body-parser": "1.18.3",
+        "content-disposition": "0.5.2",
+        "content-type": "~1.0.4",
+        "cookie": "0.3.1",
+        "cookie-signature": "1.0.6",
+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "etag": "~1.8.1",
+        "finalhandler": "1.1.1",
+        "fresh": "0.5.2",
+        "merge-descriptors": "1.0.1",
+        "methods": "~1.1.2",
+        "on-finished": "~2.3.0",
+        "parseurl": "~1.3.2",
+        "path-to-regexp": "0.1.7",
+        "proxy-addr": "~2.0.4",
+        "qs": "6.5.2",
+        "range-parser": "~1.2.0",
+        "safe-buffer": "5.1.2",
+        "send": "0.16.2",
+        "serve-static": "1.13.2",
+        "setprototypeof": "1.1.0",
+        "statuses": "~1.4.0",
+        "type-is": "~1.6.16",
+        "utils-merge": "1.0.1",
+        "vary": "~1.1.2"
+      }
+    },
+    "finalhandler": {
+      "version": "1.1.1",
+      "resolved": "http://registry.npmjs.org/finalhandler/-/finalhandler-1.1.1.tgz",
+      "integrity": "sha512-Y1GUDo39ez4aHAw7MysnUD5JzYX+WaIj8I57kO3aEPT1fFRL4sr7mjei97FgnwhAyyzRYmQZaTHb2+9uZ1dPtg==",
+      "requires": {
+        "debug": "2.6.9",
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "on-finished": "~2.3.0",
+        "parseurl": "~1.3.2",
+        "statuses": "~1.4.0",
+        "unpipe": "~1.0.0"
+      }
+    },
+    "forwarded": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/forwarded/-/forwarded-0.1.2.tgz",
+      "integrity": "sha1-mMI9qxF1ZXuMBXPozszZGw/xjIQ="
+    },
+    "fresh": {
+      "version": "0.5.2",
+      "resolved": "https://registry.npmjs.org/fresh/-/fresh-0.5.2.tgz",
+      "integrity": "sha1-PYyt2Q2XZWn6g1qx+OSyOhBWBac="
+    },
+    "http-errors": {
+      "version": "1.6.3",
+      "resolved": "http://registry.npmjs.org/http-errors/-/http-errors-1.6.3.tgz",
+      "integrity": "sha1-i1VoC7S+KDoLW/TqLjhYC+HZMg0=",
+      "requires": {
+        "depd": "~1.1.2",
+        "inherits": "2.0.3",
+        "setprototypeof": "1.1.0",
+        "statuses": ">= 1.4.0 < 2"
+      }
+    },
+    "iconv-lite": {
+      "version": "0.4.23",
+      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.23.tgz",
+      "integrity": "sha512-neyTUVFtahjf0mB3dZT77u+8O0QB89jFdnBkd5P1JgYPbPaia3gXXOVL2fq8VyU2gMMD7SaN7QukTB/pmXYvDA==",
+      "requires": {
+        "safer-buffer": ">= 2.1.2 < 3"
+      }
+    },
+    "inherits": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz",
+      "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4="
+    },
+    "ipaddr.js": {
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/ipaddr.js/-/ipaddr.js-1.8.0.tgz",
+      "integrity": "sha1-6qM9bd16zo9/b+DJygRA5wZzix4="
+    },
+    "media-typer": {
+      "version": "0.3.0",
+      "resolved": "http://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
+      "integrity": "sha1-hxDXrwqmJvj/+hzgAWhUUmMlV0g="
+    },
+    "merge-descriptors": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/merge-descriptors/-/merge-descriptors-1.0.1.tgz",
+      "integrity": "sha1-sAqqVW3YtEVoFQ7J0blT8/kMu2E="
+    },
+    "methods": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/methods/-/methods-1.1.2.tgz",
+      "integrity": "sha1-VSmk1nZUE07cxSZmVoNbD4Ua/O4="
+    },
+    "mime": {
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/mime/-/mime-1.4.1.tgz",
+      "integrity": "sha512-KI1+qOZu5DcW6wayYHSzR/tXKCDC5Om4s1z2QJjDULzLcmf3DvzS7oluY4HCTrc+9FiKmWUgeNLg7W3uIQvxtQ=="
+    },
+    "mime-db": {
+      "version": "1.37.0",
+      "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.37.0.tgz",
+      "integrity": "sha512-R3C4db6bgQhlIhPU48fUtdVmKnflq+hRdad7IyKhtFj06VPNVdk2RhiYL3UjQIlso8L+YxAtFkobT0VK+S/ybg=="
+    },
+    "mime-types": {
+      "version": "2.1.21",
+      "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.21.tgz",
+      "integrity": "sha512-3iL6DbwpyLzjR3xHSFNFeb9Nz/M8WDkX33t1GFQnFOllWk8pOrh/LSrB5OXlnlW5P9LH73X6loW/eogc+F5lJg==",
+      "requires": {
+        "mime-db": "~1.37.0"
+      }
+    },
+    "ms": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+      "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g="
+    },
+    "negotiator": {
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.1.tgz",
+      "integrity": "sha1-KzJxhOiZIQEXeyhWP7XnECrNDKk="
+    },
+    "on-finished": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/on-finished/-/on-finished-2.3.0.tgz",
+      "integrity": "sha1-IPEzZIGwg811M3mSoWlxqi2QaUc=",
+      "requires": {
+        "ee-first": "1.1.1"
+      }
+    },
+    "parseurl": {
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/parseurl/-/parseurl-1.3.2.tgz",
+      "integrity": "sha1-/CidTtiZMRlGDBViUyYs3I3mW/M="
+    },
+    "path-to-regexp": {
+      "version": "0.1.7",
+      "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-0.1.7.tgz",
+      "integrity": "sha1-32BBeABfUi8V60SQ5yR6G/qmf4w="
+    },
+    "proxy-addr": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/proxy-addr/-/proxy-addr-2.0.4.tgz",
+      "integrity": "sha512-5erio2h9jp5CHGwcybmxmVqHmnCBZeewlfJ0pex+UW7Qny7OOZXTtH56TGNyBizkgiOwhJtMKrVzDTeKcySZwA==",
+      "requires": {
+        "forwarded": "~0.1.2",
+        "ipaddr.js": "1.8.0"
+      }
+    },
+    "qs": {
+      "version": "6.5.2",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.5.2.tgz",
+      "integrity": "sha512-N5ZAX4/LxJmF+7wN74pUD6qAh9/wnvdQcjq9TZjevvXzSUo7bfmw91saqMjzGS2xq91/odN2dW/WOl7qQHNDGA=="
+    },
+    "range-parser": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.0.tgz",
+      "integrity": "sha1-9JvmtIeJTdxA3MlKMi9hEJLgDV4="
+    },
+    "raw-body": {
+      "version": "2.3.3",
+      "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-2.3.3.tgz",
+      "integrity": "sha512-9esiElv1BrZoI3rCDuOuKCBRbuApGGaDPQfjSflGxdy4oyzqghxu6klEkkVIvBje+FF0BX9coEv8KqW6X/7njw==",
+      "requires": {
+        "bytes": "3.0.0",
+        "http-errors": "1.6.3",
+        "iconv-lite": "0.4.23",
+        "unpipe": "1.0.0"
+      }
+    },
+    "safe-buffer": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
+    },
+    "safer-buffer": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
+      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
+    },
+    "send": {
+      "version": "0.16.2",
+      "resolved": "https://registry.npmjs.org/send/-/send-0.16.2.tgz",
+      "integrity": "sha512-E64YFPUssFHEFBvpbbjr44NCLtI1AohxQ8ZSiJjQLskAdKuriYEP6VyGEsRDH8ScozGpkaX1BGvhanqCwkcEZw==",
+      "requires": {
+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "destroy": "~1.0.4",
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "etag": "~1.8.1",
+        "fresh": "0.5.2",
+        "http-errors": "~1.6.2",
+        "mime": "1.4.1",
+        "ms": "2.0.0",
+        "on-finished": "~2.3.0",
+        "range-parser": "~1.2.0",
+        "statuses": "~1.4.0"
+      }
+    },
+    "serve-static": {
+      "version": "1.13.2",
+      "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.13.2.tgz",
+      "integrity": "sha512-p/tdJrO4U387R9oMjb1oj7qSMaMfmOyd4j9hOFoxZe2baQszgHcSWjuya/CiT5kgZZKRudHNOA0pYXOl8rQ5nw==",
+      "requires": {
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "parseurl": "~1.3.2",
+        "send": "0.16.2"
+      }
+    },
+    "setprototypeof": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.1.0.tgz",
+      "integrity": "sha512-BvE/TwpZX4FXExxOxZyRGQQv651MSwmWKZGqvmPcRIjDqWub67kTKuIMx43cZZrS/cBBzwBcNDWoFxt2XEFIpQ=="
+    },
+    "statuses": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.4.0.tgz",
+      "integrity": "sha512-zhSCtt8v2NDrRlPQpCNtw/heZLtfUDqxBM1udqikb/Hbk52LK4nQSwr10u77iopCW5LsyHpuXS0GnEc48mLeew=="
+    },
+    "type-is": {
+      "version": "1.6.16",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.16.tgz",
+      "integrity": "sha512-HRkVv/5qY2G6I8iab9cI7v1bOIdhm94dVjQCPFElW9W+3GeDOSHmy2EBYe4VTApuzolPcmgFTN3ftVJRKR2J9Q==",
+      "requires": {
+        "media-typer": "0.3.0",
+        "mime-types": "~2.1.18"
+      }
+    },
+    "unpipe": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
+      "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
+    },
+    "utils-merge": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
+    },
+    "vary": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
+    }
+  }
+}

server.js

@@ -0,0 +1,26 @@
+/*
+Copyright 2018 Google Inc.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+   http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+const express = require('express');
+const app = express();
+
+// This serves static files from the specified directory
+app.use(express.static(__dirname));
+
+const server = app.listen(8081, () => {
+
+  const host = server.address().address;
+  const port = server.address().port;
+
+  console.log('App listening at http://%s:%s', host, port);
+});

sw.js

@@ -1,17 +1,17 @@
 const filesToCache = [
-  '/',
-  'css/appstyling-v2.css',
-  'css/main.css',
-  'js/Weight Calculation Script-Edited-Jquery-V4.js',
-  'images/45lbs-Plate.svg',
-  'images/35lbs-Plate.svg',
-  'images/25lbs-Plate.svg',
-  'images/10lbs-Plate.svg',
-  'images/5lbs-Plate.svg',
-  'images/2halflbs-Plate.svg',
-  'images/favicon-16x16.png',
-  'images/favicon-32x32.png',
-  'index.html',
+  './',
+  './css/appstyling-v2.css',
+  './css/main.css',
+  './js/Weight Calculation Script-Edited-Jquery-V4.js',
+  './images/45lbs-Plate.svg',
+  './images/35lbs-Plate.svg',
+  './images/25lbs-Plate.svg',
+  './images/10lbs-Plate.svg',
+  './images/5lbs-Plate.svg',
+  './images/2halflbs-Plate.svg',
+  './images/favicon-16x16.png',
+  './images/favicon-32x32.png',
+  './index.html'
 ];
 
 const staticCacheName = 'pages-cache-v1';
@@ -26,33 +26,6 @@ self.addEventListener('install', event => {
   );
 });
 
-self.addEventListener('fetch', event => {
-  console.log('Fetch event for ', event.request.url);
-  event.respondWith(
-    caches.match(event.request)
-    .then(response => {
-      if (response) {
-        console.log('Found ', event.request.url, ' in cache');
-        return response;
-      }
-      console.log('Network request for ', event.request.url);
-      return fetch(event.request)
-      .then(response => {
-        // TODO 5 - Respond with custom 404 page
-        return caches.open(staticCacheName).then(cache => {
-          cache.put(event.request.url, response.clone());
-          return response;
-      });
-    });
-
-    }).catch(error => {
-
-      // TODO 6 - Respond with custom offline page
-
-    })
-  );
-});
-
 self.addEventListener('activate', event => {
   console.log('Activating new service worker...');
 
@@ -70,3 +43,31 @@ self.addEventListener('activate', event => {
     })
   );
 });
+
+self.addEventListener('fetch', event => {
+  console.log('Fetch event for ', event.request.url);
+  event.respondWith(
+    caches.match(event.request)
+    .then(response => {
+      if (response) {
+        console.log('Found ', event.request.url, ' in cache');
+        return response;
+      }
+      console.log('Network request for ', event.request.url);
+      return fetch(event.request)
+      .then(response => {
+        if (response.status === 404) {
+          return caches.match('index.html');
+        }
+        return caches.open(staticCacheName)
+        .then(cache => {
+          cache.put(event.request.url, response.clone());
+          return response;
+        });
+      });
+    }).catch(error => {
+      console.log('Error, ', error);
+      return caches.match('index.html');
+    })
+  );
+});