fix(deploy): use expose instead of host ports for Coolify compose

Coolify honors host port bindings in the compose and the host already has :80
(its own proxy) and :8000 allocated, so publishing them fails the deploy at
container start. Switch web/api to expose-only; nginx still reaches api over the
compose network, and Coolify routes the domain via docker_compose_domains. Add a
docker-compose.override.yml so local 'docker compose up' still publishes ports.

.dockerignore

@@ -5,3 +5,4 @@ dist
 backend
 data
 .zed
+docker-compose*.yml