fix a bug when trying to build an electron.js / react application

I have a project made with electron.js that when I try to build I get the following error:
"Application entry file "build\electron.js" in the "C:\Users\...\dist\win-unpacked\resources\app.asar" does not exist. Seems like a wrong configuration."

Once the bug is fixed I would like to set the program to auto-update with new commits in the main branch of github (all this can be done with electron-builder, I think...)