[REQ] Make server port a command-line option

Is your feature request related to a problem? Please describe.

Problem: port is hardcoded, but often, you want your server to run on a different port without having to recompile from code

Describe the solution you'd like

add a command-line option to run server on a user-specified port

for example, to run on 8081:
myserver -p 8081

Note: I only need this solution (for now) implemented in go-server.

Describe alternatives you've considered

Using the serverPort configuration option still hardcodes the port and once the binary is created, the port cannot be changed without recompilation

Additional context

Am happy to make this change, for go-server only, and create a pull request if you can give an indication that it would be taken

Start by locating the go-server command-line entry point and the code that currently uses the hardcoded server port. Check how the existing serverPort configuration is handled and find the relevant go-server tests, if present. Done means the generated server can accept a user-specified port such as 8081 through -p without recompilation.