fix(compose): drop host port binding, add Coolify FQDN hints for Traefik

Removes the postgrest host port (3000:3000) that the README already flagged
as local-dev-only. Adds SERVICE_FQDN_POSTGREST_3000 / SERVICE_FQDN_TRIPS_WEB_8080
environment hints so Coolify auto-wires Traefik routing to the correct
container ports when this stack is deployed as a Docker Compose resource.

Local dev: re-add ports via a gitignored compose/docker-compose.override.yaml.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

compose/docker-compose.yaml

@@ -15,11 +15,11 @@ services:
       PGRST_DB_MAX_ROWS: "10000"
       PGRST_OPENAPI_SERVER_PROXY_URI: ${PGRST_PUBLIC_URL:-http://localhost:3000}
       PGRST_SERVER_CORS_ALLOWED_ORIGINS: ${TRIPS_WEB_URL:-http://localhost:5173}
-    # Local-dev convenience: bind to host port 3000 so the React dev server
-    # can hit it without going through Caddy. Coolify deployments should
-    # remove this and route via the platform's reverse proxy instead.
-    ports:
-      - "3000:3000"
+      # Coolify magic: triggers FQDN assignment + Traefik routing to port 3000.
+      # Set the actual FQDN in the Coolify resource's Domains panel.
+      SERVICE_FQDN_POSTGREST_3000: ${PGRST_PUBLIC_URL}
+    # No host port binding for Coolify. For local dev, drop a
+    # compose/docker-compose.override.yaml that re-adds: ports: ["3000:3000"].
 
   trips_web:
     build:
@@ -31,7 +31,10 @@ services:
     restart: always
     expose:
       - "8080"
+    environment:
+      # Coolify magic: triggers FQDN assignment + Traefik routing to port 8080.
+      # Set the actual FQDN in the Coolify resource's Domains panel.
+      SERVICE_FQDN_TRIPS_WEB_8080: ${TRIPS_WEB_URL}
     depends_on:
       - postgrest
-    # No host port binding for production. For local dev, prefer running
-    # `pnpm dev` directly against the postgrest service above.
+    # For local dev, prefer running `pnpm dev` directly against postgrest.