ReactJS doesn't render in Electron

Hello,

this is my code: https://gitlab.com/t0msk/electron-test

as you can see I have in /src/index.js that App should be included in

with id root, I have that
in /src/index.html , and /src/components/App.js should display some Electron text, but it doesn’t I don’t know where is the problem.

If you open developer tools in your electron app, you’ll be able to see what the error is either in the render windows javascript console or in the resources tab if it cant find a file.