Mixed content error: JS and CSS blocked, the content must be served over HTTPS.

[thomascenni]

When deploying to Render or Fly, which automatically serve the application with HTTPS, the installation page doesn't render correctly.

I know that defining the correct url starting with HTTPS, this problem should be solved, but for example when I deploy to Render, I don't know the url that will be assigned to the application.
Any idea?