Add health check for Docker container (#179)

- Introduced `HealthCheck` in `docker-compose.yml` to monitor container status.
- Added a test step to validate container's health using Docker Compose in the GitHub workflow.
- Updated `Dockerfile` to include `curl` for health check commands.

docker-compose.yml

@@ -11,5 +11,12 @@ services:
       - ./conf:/conf
       - ./db:/db
     ports:
-      - 9998:9998
+      - "9998:9998"
     restart: unless-stopped
+    healthcheck:
+      # The container will immediately stop when health check fails after retries
+      test: ["CMD-SHELL", "curl --fail --silent --show-error --max-time 5 http://localhost:9998/ || exit 1"]
+      interval: 120s
+      timeout: 10s
+      retries: 1
+      start_period: 10s