Doesn't work at all

[kopyl]

When I run ng s, i get this:

Olehs-MacBook-Pro:stopWatch-main olehkopyl$ ng s
An unhandled exception occurred: Cannot find module '@angular-devkit/build-angular/package.json'
Require stack:
- /usr/local/lib/node_modules/@angular/cli/node_modules/@angular-devkit/architect/node/node-modules-architect-host.js
- /usr/local/lib/node_modules/@angular/cli/node_modules/@angular-devkit/architect/node/index.js
- /usr/local/lib/node_modules/@angular/cli/models/architect-command.js
- /usr/local/lib/node_modules/@angular/cli/commands/serve-impl.js
- /usr/local/lib/node_modules/@angular/cli/node_modules/@angular-devkit/schematics/tools/export-ref.js
- /usr/local/lib/node_modules/@angular/cli/node_modules/@angular-devkit/schematics/tools/index.js
- /usr/local/lib/node_modules/@angular/cli/utilities/json-schema.js
- /usr/local/lib/node_modules/@angular/cli/models/command-runner.js
- /usr/local/lib/node_modules/@angular/cli/lib/cli/index.js
- /usr/local/lib/node_modules/@angular/cli/lib/init.js
See "/private/var/folders/bh/55g94q1x3hdfscnrgqk931fc0000gp/T/ng-nD324S/angular-errors.log" for further details.
Olehs-MacBook-Pro:stopWatch-main olehkopyl$

[kopyl]

By the way, I've also been working on this task: https://github.com/kopyl/timerTestTask

[kopyl]

Your issue was only solved by googling and npm install --save-dev @angular-devkit/build-angular

Please make your app available to run by just running ng s without any configurations.