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.

docker-compose.override.yml

@@ -0,0 +1,11 @@
+# Local-only host port bindings for `docker compose up`. Docker Compose
+# auto-merges this file locally; Coolify runs with an explicit
+# `-f docker-compose.yml`, so it ignores this override (no host-port conflicts
+# on the Coolify host). Open http://localhost:8080 after `docker compose up`.
+services:
+  web:
+    ports:
+      - "8080:80"
+  api:
+    ports:
+      - "8000:8000"