[Feature]: Docker Secrets/File-based ENV VAR Reading Support

[Neutronlul]

Describe the feature

Unless I'm missing something, there's no existing support in Tracearr for passing environment variables to the tracearr container via files. In my use-case, I don't have a great way to securely pass raw env vars to containers, and prefer to use Docker Secrets.

Examples or references

The most common pattern I've encountered for this is a FILE affix to the regular environment variable name that accepts a file path. For example:

COOKIE_SECRET=xyz
COOKIE_SECRET_FILE=/run/secrets/cookie_secret

Or how lscr.io does it: (link)

Environment variables from files (Docker secrets)

You can set any environment variable from a file by using a special prepend FILE__.

As an example:

-e FILE__MYVAR=/run/secrets/mysecretvariable

Will set the environment variable MYVAR based on the contents of the /run/secrets/mysecretvariable file.

Platform

• Web Dashboard
• Mobile App
• Server / API

[connorgallopo]

Done