Turing is a student development server in the Department of Computer and Information Science at the University of Mississippi. It is a Debian 10 (Buster) virtual machine running Apache2 with PHP, among other things.
If your Go webserver cannot execute due to the port being taken, try killing all Go processes created by your user. Run the following snippet in your shell (without the leading '$'):
$ kill -9 $(ps -U $(whoami) -u $(whoami) | grep go$ | awk '{ print $1 }')