[FEATURE REQUEST] Pass in agent secret to docker as file

[jagg2]

Possibility of adding the ability to use the _FILE convention for passing in SECRET_KEY when running in docker/podman.
As far as I can tell the only option is passing in via SECRET_KEY environment variable.

[gammamonbiscuit]

Force override the entrypoint with launch arguments that load the secret file can do the job. By the way playit is doing a major rework of the agent's startup logic so this is very likely won't work in v1.x.x.

services:
  playit:
    image: ghcr.io/playit-cloud/playit-agent:0.17.1
    volumes:
      - type: bind
        source: ~/playit.toml
        target: /etc/playit/playit.toml
    entrypoint: ["playit", "-s", "--secret_path", "/etc/playit/playit.toml", "--platform_docker", "start"]
    network_mode: host