feat!: respect COMPOSE_FILE env and remove docker command

Read COMPOSE_FILE from env and use it if it is set. Default is still
docker/local/docker-compose.yaml.

BREAKING CHANGE: Removed docker subcommand. Added deprecation notice to
compose subcommand.

src/cli/mod.rs

@@ -1,11 +1,9 @@
 mod ahab;
 mod django;
-mod docker;
 mod docker_compose;
 mod postgres;
 
 pub use ahab::{Ahab, Commands};
 pub use django::Django;
-pub use docker::Docker;
 pub use docker_compose::DockerCompose;
 pub use postgres::Postgres;