Caddy support

[LordTermor]

Updates docker-compose and CD workflow to support caddy reverse proxy

[romangg]

The first two commits could be combined. The first commit is useless without the second from a functional perspective. In the third commit why do you use the compose plugin now in CLI? A short comment in the commit message would help me/us understand the decision better down the line.

Regarding your commit messages: conventional commits requires lower-case letter after the type(scope):. Not a big one though.

[LordTermor]

The first two commits could be combined. The first commit is useless without the second from a functional perspective.

Caddy docker-compose file can be used independently of CD routine that's why I separated them.

In the third commit why do you use the compose plugin now in CLI?

It seems the compose as a CLI plugin has a newer version than docker-compose utility in CI environment.