title: How to solve this error when running 'yarn start'?
body: <p>I am trying to run a project that is bootstrapped with react app:
  <a href="https://github.com/dcbuild3r/ethgaswatch" rel="nofollow noreferrer">https://github.com/dcbuild3r/ethgaswatch</a></p>
  <p>When I try to run the app in development mode using 'yarn start' in terminal I get the following:</p>
  <pre class="lang-none prettyprint-override"><code>PS C:\Users\alaiy\Documents\Projects\Python\ethgaswatch\web&gt; yarn start
  yarn run v1.22.17
  warning package.json: No license field
  $ concurrently 'react-scripts start' 'netlify-lambda serve src/functions'
  [0] ''react-scripts' is not recognized as an internal or external command, 
  [0] operable program or batch file.
  [1] 'start'' is not recognized as an internal or external command,
  [1] operable program or batch file.
  [2] ''netlify-lambda' is not recognized as an internal or external command,
  [2] operable program or batch file.
  [3] 'serve' is not recognized as an internal or external command,
  [3] operable program or batch file.
  [4] 'src' is not recognized as an internal or external command,
  [4] operable program or batch file.
  [2] 'netlify-lambda exited with code 1
  [1] start' exited with code 1
  [0] 'react-scripts exited with code 1 
  [4] src/functions' exited with code 1 
  [3] serve exited with code 1
  error Command failed with exit code 1.
  info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
  </code></pre>
  <p>I've not had this issue before when using yarn start so not sure what I'm doing wrong. As far as I know, I have installed the dependencies through npm.</p>
  <p>I have read the concurrently docs. Now rather than running <code>yarn start</code>, if i run <code>concurrently 'react-scripts start' 'netlify-lambda serve src/functions'</code> in terminal i still get the same error however now my error does not contain the extra quote at the start.</p>
  <pre><code>PS C:\Users\alaiy\Documents\Projects\Python\ethgaswatch\web&gt; concurrently 'react-scripts start' 'netlify-lambda serve src/functions'
  [0] 'react-scripts' is not recognized as an internal or external command,
  [0] operable program or batch file.
  [0] react-scripts start exited with code 1
  [1] 'netlify-lambda' is not recognized as an internal or external command,
  [1] operable program or batch file.
  [1] netlify-lambda serve src/functions exited with code 1
  </code></pre>