Usage of Environment Variables as variables

Is there anyway to use existing Environment Variables as variables inside other Env vars?

For example:

Given that I have two environment variables: and
I want to make a third Environment Variable: ALLOWED_HOSTS={HOST}, {HOST2}.

Is this currently possible in Qovery?

Context: coming from DigitalOcean App Platform, this is a feature that has helped me tons to simplify the setup of projects.

This is what we call Environment Variable Substitution and we plan to deliver this feature in the coming weeks.

You can see the thread below.

Feel free to upvote for the features you would like to see on our public roadmap.