Edge mode selection incompatible with secrets management

[Squeebly-Joe]

When passing the TOKEN option as a secret to the hawser service with an environment file, Edge mode will not activate because the TOKEN key doesn't appear in the config file. Standard mode is unaffected by this.

I propose that Edge mode selection is enabled based solely on the DOCKHAND_SERVER_URL key existing, or adding a TOKEN_FILE option that would read the token directly from a secret file.

[andrewharle]

Which container environment and version are you using?

I pass DOCKHAND_SERVER_URL via a normal env var and the secret (via podman secrets) to the env var TOKEN. Edge mode works for me without problem on Podman 5.4.2 on Debian.