npm install
npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR! 
npm ERR! While resolving: helloapp@1.0.0
npm ERR! Found: zone.js@0.11.4
npm ERR! node_modules/zone.js
npm ERR!   zone.js@"~0.11.3" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer zone.js@"~0.10.3" from @angular/core@11.0.9
npm ERR! node_modules/@angular/core
npm ERR!   @angular/core@"~11.0.0" from the root project
npm ERR!   peer @angular/core@"11.0.9" from @angular/common@11.0.9
npm ERR!   node_modules/@angular/common
npm ERR!     @angular/common@"~11.0.0" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR!
npm ERR! See C:\Users\User\AppData\Local\npm-cache\eresolve-report.txt for a full report.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\User\AppData\Local\npm-cache\_logs\2021-03-26T15_45_36_432Z-debug.log