Hi, first of all make sure you are runnig all the databases you want. Just check if their are running using docker ps -a. Then make sure you can connect to them using what tool you like. And then you can run it all.

From what I see thee is no error exit 127, but the program tries to connect to localhost (127.0.0.1) on port 3307 and the connection is refused.

Is the database running on localhost, port 3307?