title: Cant cd into folder during heroku deployment
body: <p>I am trying to deploy my MERN stack to Heroku but there is an error when I try 'git push heroku master' saying 'sh: 1: cd: can't cd to ../react-front'.
  My Folder 'app' has two folders: 'node-api' and 'react-front'. In the node-api, package.json file, I have the line &quot;heroku-postbuild&quot;: &quot;cd ../react-front &amp;&amp; npm install &amp;&amp; npm run build&quot;
  which is giving this error. How do I fix this?</p>