title: 'SyntaxError: Unexpected strict mode reserved word' when editing my reactjs webpack config file
body: <p>I was trying to fix my Invalid Host Error by following the directions on the answer to this question: <a href="https://stackoverflow.com/questions/43619644/i-am-getting-an-invalid-host-header-message-when-connecting-to-webpack-dev-ser/43621275#43621275">I am getting an &quot;Invalid Host header&quot; message when connecting to webpack-dev-server remotely</a></p>
  <p>However, when I do what they say, I get this error:</p>
  <pre><code> frontend@0.1.0 start /home/ubuntu/app/frontend
   react-scripts start
  
  /home/ubuntu/app/frontend/node_modules/react-scripts/config/webpack.config.js:722
    public: 'mywebsite.org' // That solved it
    ^^^^^^
  
  SyntaxError: Unexpected strict mode reserved word
      at wrapSafe (internal/modules/cjs/loader.js:915:16)
      at Module._compile (internal/modules/cjs/loader.js:963:27)
      at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)
      at Module.load (internal/modules/cjs/loader.js:863:32)
      at Function.Module._load (internal/modules/cjs/loader.js:708:14)
      at Module.require (internal/modules/cjs/loader.js:887:19)
      at require (internal/modules/cjs/helpers.js:74:18)
      at Object.&lt;anonymous&gt; (/home/ubuntu/app/frontend/node_modules/react-scripts/scripts/start.js:48:23)
      at Module._compile (internal/modules/cjs/loader.js:999:30)
      at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)
  npm ERR! code ELIFECYCLE
  npm ERR! errno 1
  npm ERR! frontend@0.1.0 start: `react-scripts start`
  npm ERR! Exit status 1
  npm ERR! 
  npm ERR! Failed at the frontend@0.1.0 start script.
  npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
  
  npm ERR! A complete log of this run can be found in:
  </code></pre>
  <p>Why is this and how can I fix it</p>