Add healthcheck on database service (#1304)

Author: maxhelias

doctrine/doctrine-bundle/2.12/manifest.json

@@ -28,6 +28,11 @@
                 "    # You should definitely change the password in production",
                 "    POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-!ChangeMe!}",
                 "    POSTGRES_USER: ${POSTGRES_USER:-app}",
+                "  healthcheck:",
+                "    test: [\"CMD\", \"pg_isready\"]",
+                "    timeout: 5s",
+                "    retries: 5",
+                "    start_period: 60s",
                 "  volumes:",
                 "    - database_data:/var/lib/postgresql/data:rw",
                 "    # You may use a bind-mounted host directory instead, so that it is harder to accidentally remove the volume and lose all your data!",