Help launching/running CLI application from VSCode

I’m trying to run a commandline application from within VSCode.
Link to my repository.
This is the Chapter 13 code from “Programming Elixir”.

Things I’ve tried:

1. Added a main(argv) to the module.

2. Added escript: [main_module: Issues.CLI], to the mix.exs file.

3. Created a launch.json configuration:

       {
           "type": "mix_task",
           "name": "mix CLI",
           "request": "launch",
           "projectDir": "${workspaceRoot}",
           "task": "run",
           "taskArgs": [
               "lib/issues/cli.ex"
           ]
       },
   

When I click ‘Run and Debug’ it seems to compile and start, but I never hit a breakpoint set in either the main or run function.

Any help is appreciated, thank you.