Documentation: Steps to test angular is outdated/

[vicmarcal]

URL
https://github.com/ionic-team/ionic-framework/tree/main/angular

What is missing or inaccurate about the content on this page?
Trying to test ng-add in Ionic seems to miss steps/outdated.
Steps suggested are:

Pull the latest from master
Build ionic/angular: npm run build
Run npm link from ionic/angular/dist directory
Create a blank angular project

However:
It misses "npm install" or npm run build would fail with:

npm ERR! @ionic/angular@5.8.5 clean: `node scripts/clean.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the @ionic/angular@5.8.5 clean script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm WARN Local package.json exists, but node_modules missing, did you mean to install?

After the "npm install", npm run build fails with:

Error: ENOENT: no such file or directory, stat '/Users/victormartinez/Desktop/Proyectos/IonicTests/ionic/ionic-framework/core/node_modules/ionicons'
    at Object.statSync (fs.js:1086:3)
    at Object.statSync (/Users/victormartinez/Desktop/Proyectos/IonicTests/ionic/ionic-framework/angular/node_modules/graceful-fs/polyfills.js:308:16)
    at checkStats (/Users/victormartinez/Desktop/Proyectos/IonicTests/ionic/ionic-framework/angular/node_modules/fs-extra/lib/copy-sync/copy-sync.js:171:22)
    at checkPaths (/Users/victormartinez/Desktop/Proyectos/IonicTests/ionic/ionic-framework/angular/node_modules/fs-extra/lib/copy-sync/copy-sync.js:183:31)
    at Object.copySync (/Users/victormartinez/Desktop/Proyectos/IonicTests/ionic/ionic-framework/angular/node_modules/fs-extra/lib/copy-sync/copy-sync.js:25:20)
    at copyIonicons (/Users/victormartinez/Desktop/Proyectos/IonicTests/ionic/ionic-framework/angular/scripts/build-core.js:13:6)
    at Object.<anonymous> (/Users/victormartinez/Desktop/Proyectos/IonicTests/ionic/ionic-framework/angular/scripts/build-core.js:60:1)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
    at Module.load (internal/modules/cjs/loader.js:928:32) {
  errno: -2,
  syscall: 'stat',
  code: 'ENOENT',
  path: '/Users/victormartinez/Desktop/Proyectos/IonicTests/ionic/ionic-framework/core/node_modules/ionicons'
}
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! @ionic/angular@5.8.5 build.core: `node scripts/build-core.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the @ionic/angular@5.8.5 build.core script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/victormartinez/.npm/_logs/2021-11-01T22_52_49_321Z-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! @ionic/angular@5.8.5 build: `npm run clean && npm run build.ng && npm run build.core && npm run clean-generated`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the @ionic/angular@5.8.5 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/victormartinez/.npm/_logs/2021-11-01T22_52_49_409Z-debug.log