I recently posted Background image not showing with CSS and thought it has to be something with the url I included even though I was sure it was correct (they were in the same directory so it was straightforward). I wasn't able to resolve that issue and now, I face the same issue but for a .js file.
Picture of work space:
Picture of the Run prompt:
In app.js I do have require('./like_button');. I am new to using these technologies, I must be missing something general...


You have to serve the static file from a specific folder. In your case
views.Add this line where you've declared your app.
For more reference check out
http://expressjs.com/en/starter/static-files.html