feat: add health check endpoint

src/main.py

@@ -142,3 +142,9 @@ async def ping() -> dict[str, str]:
         'message': 'pong',
         'status': 'ok',
     }
+
+@app.get('/health')
+async def health() -> dict[str, str]:
+    return {
+        'status': 'ok',
+    }