PM2 loopback

 https://medium.com/@katanyoo_ubalee/%E0%B8%81%E0%B8%B2%E0%B8%A3-config-%E0%B8%84%E0%B9%88%E0%B8%B2%E0%B8%AA%E0%B8%B3%E0%B8%AB%E0%B8%A3%E0%B8%B1%E0%B8%9A-environment-%E0%B8%95%E0%B9%88%E0%B8%B2%E0%B8%87%E0%B9%86-%E0%B8%9A%E0%B8%99-loopback-%E0%B9%81%E0%B8%A5%E0%B8%B0%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B8%A3%E0%B8%B1%E0%B8%99-pm2-%E0%B8%9A%E0%B8%99-environment-%E0%B8%97%E0%B8%B5%E0%B9%88%E0%B9%80%E0%B8%A3%E0%B8%B2%E0%B8%95%E0%B9%89%E0%B8%AD%E0%B8%87%E0%B8%81%E0%B8%B2%E0%B8%A3-3d50b311904e

updated from version 7 to Angular 8.

 ng update @angular/cli @angular/core --allow-dirty --force

ng update @angular/cli @angular/core --allow-dirty