Env vars in YML - only substituded with OS' ones

[Lilly]

Set Environmental Variables

This is a how-to guide that will walk you through the process of setting up environmental variables in a self-hosted Discourse Installation. Environmental variables are a crucial part of configuring your Discourse instance, and they can be used to store sensitive information such as API keys and database passwords. Adding environmental variables to a .yml (YAML) file is straightforward. Here’s a basic example: # This is a YAML file with environmental variabl…