chore: add healthcheck probe to prod docker-compose app service

docker-compose.prod.yml

@@ -17,6 +17,12 @@ services:
       db:
         condition: service_healthy
     container_name: portabase-app-prod
+    healthcheck:
+      test: ["CMD-SHELL", "curl -f http://localhost:80/api/health || exit 1"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 10s
 
   db:
     image: postgres:16-alpine