runtime error

Exit code: 3. Reason: ialization error: 2005 (HY000): Unknown MySQL server host 'novelcrafter-novelcrafter.g.aivencloud.com' (-2) ERROR: Traceback (most recent call last): File "/usr/local/lib/python3.10/site-packages/mysql/connector/connection_cext.py", line 334, in _open_connection self._cmysql.connect(**cnx_kwargs) _mysql_connector.MySQLInterfaceError: Unknown MySQL server host 'novelcrafter-novelcrafter.g.aivencloud.com' (-2) The above exception was the direct cause of the following exception: Traceback (most recent call last): File "/app/app/main.py", line 111, in init_db conn = mysql.connector.connect(**db_config) File "/usr/local/lib/python3.10/site-packages/mysql/connector/pooling.py", line 322, in connect return CMySQLConnection(*args, **kwargs) File "/usr/local/lib/python3.10/site-packages/mysql/connector/connection_cext.py", line 151, in __init__ self.connect(**kwargs) File "/usr/local/lib/python3.10/site-packages/mysql/connector/abstracts.py", line 1399, in connect self._open_connection() File "/usr/local/lib/python3.10/site-packages/mysql/connector/connection_cext.py", line 339, in _open_connection raise get_mysql_exception( mysql.connector.errors.DatabaseError: 2005 (HY000): Unknown MySQL server host 'novelcrafter-novelcrafter.g.aivencloud.com' (-2) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/local/lib/python3.10/site-packages/starlette/routing.py", line 693, in lifespan async with self.lifespan_context(app) as maybe_state: File "/usr/local/lib/python3.10/site-packages/starlette/routing.py", line 569, in __aenter__ await self._router.startup() File "/usr/local/lib/python3.10/site-packages/starlette/routing.py", line 672, in startup handler() File "/app/app/main.py", line 161, in startup_event init_db() File "/app/app/main.py", line 156, in init_db cursor.close() UnboundLocalError: local variable 'cursor' referenced before assignment ERROR: Application startup failed. Exiting.

Container logs: