Hi all, I have an elixir umbrella app that I deploy via docker-compose. I’d like to use env_file directive in my docker-compose.yml for things like guardian keys etc. I have my env vars in a my_app.env file which is referred to in the docker-compose.yml. The vars do not appear to be available at runtime because when I try to generate a JWT with guardian, the phoenix endpoint generates a Bad Request. If I return the hardcoded key, it works OK.

Any recommendations to getting secrets or env vars injected into a running docker elixir app? I also tried docker secrets via the docker-compose file and I can confirm that the umbrella app cannot find the /run/secrets/secret_file path/volume, even though docker builds the image without error. I did notice that /run/secrets doesn’t appear in docker volumes ls but that might not be either here or there.