Deploy Env Vars

You can add environment variables to your container available at runtime.

Inside your app environment you have a Env Vars tab, there when you add a new env var you can select the Used for field, that can be Deploy, Build or Both. So for them to be available at runtime you should choose Deploy or Both.

Check Build Env Vars for more info about build env vars.

You can use these env vars as you want inside your app.