Debugging the ARM action in local machine
Open PowerShell, go to the directory where the repo is stored (.../arm-deploy/) and execute the following commands.
1.npm install
npm install downloads dependencies defined in a package. json file and generates a node_modules folder with the installed modules.
2.npm install -g @zeit/ncc
3.ncc build src/entrypoint.ts -s -o _build
ncc is a simple CLI for compiling a Node.js module into a single file, together with all its dependencies, gcc-style.
4. az login
This will open the browser, where you can do the Azure login which gives you proper access required for the action.
Open the arm-deploy repository in VSCode, attach debugging points at required places (flow begins from entrypoint.ts) and press F5. The debugger gets attached.
Also, for various input values required while testing, you can specify those as environment variables in launch.json that gets created.
Happy debugging!