Support for Docker Secrets

[ShadowPeo]

Is your feature request related to a problem? Please describe. It is not a problem per se with the application but more so with the security of credentials included in the docker-compose file.

Describe the solution you'd like Support for the Docker Secrets functions, specifically on user/pass/API key fields utilising the _FILE suffix to the variable name as per the standard for most containers.

Describe alternatives you've considered There are no real alternatives to this apart from a sequestered environment file that can be referenced by importing the environment variables, but this is not the official method of handling this.

I can provide an example YAML from another service that does support this if required