App.css missing when deploying Phoenix app to


I am deploying a Phoenix application. This works well locally (localhot:4000), however on the production environment, the app.css is appears to be missing:



I am deploying with This is the Github workflow that does the deploy:

The project can be seen here:

Before deploying I did run mix assets.deploy, but this seems to be doing nothing.


I have also read this, but I don’t think I missed something:

Does anyone know if I am missing something?

Turns out, the app.css was broken and as a consequence it was not being served to the clients. The reason for this what that VSCode was breaking my app.css file by formatting it incorrectly, automatically, every time I saved.

I fixed my VSCode in this other topic: