Build in dev mode for Angular 12

I’ve just added a development section under build/configurations

"development": {
          "optimization": false,
          "sourceMap": true,
          "namedChunks": true,
          "extractLicenses": true,
          "vendorChunk": true,
          "buildOptimizer": false,
          "budgets": [
            {
              "type": "initial",
              "maximumWarning": "2mb",
              "maximumError": "6mb"
            },
            {
              "type": "anyComponentStyle",
              "maximumWarning": "6kb",
              "maximumError": "10kb"
            }
          ]
        }

And under serve/configurations:

 "development": {
          "browserTarget": "studio:build:development"
        }

Then for running it on the go (embed web-server), run this command:

ng serve myapp --configuration development

Also for building and running the development version on a web-server (like NGinx) you could run this command:

ng build --configuration development