add health check endpoint

docker/docker-compose.yml

@@ -5,5 +5,11 @@ services:
       dockerfile: docker/Dockerfile
     ports:
       - "8000:8000"
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8080/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 40s
     environment:
       SQL_FILE_NAME: ${SQL_FILE_NAME:-/data/app.db}