I have the same issue in the tutorial. (pymysql.err.OperationalError) (2003, "Can't connect to MySQL server on 'localhost' ( [Errno 2] No such file or directory)" Connection fails when deployed to ...

Recently our own CI (Github Actions based) pipelines started failing with the following error: P1001 Can't reach database server at `localhost`:`3306` Please make sure your database server is running ...