[Port] address already in use

As is port 3000 and 8080, port 5000 is commonly used to serve local development servers.

I noticed that a Docker container couldn't use port 5000.

I checked for conflicting processes using lsof.

sudo lsof -i :5000

 

I found out the process using the port was named ControlCenter, which is a native macOS application

 

To resolve this issue, I unchecked AirPlay Receiver.