docs(angular): add build-environments content (#6845)

src/data/roadmaps/angular/content/build-environments@Ax-s_xw3FO3Ocv-AnLbQD.md

@@ -1 +1,8 @@
-# Build Environments
+# Build Environments
+
+You can define different named build configurations for your project, such as `development` and `production`, with different defaults. Each named configuration can have defaults for any of the options that apply to the various builder targets, such as `build`, `serve`, and `test`. The Angular CLI can replace files for each environment if you pass a `--configuration` flag with the named configuration when running a CLI command.
+
+Visit the following resources to learn more:
+
+- [@official@Angular Official Docs - Build environments](https://angular.dev/tools/cli/environments#using-environment-specific-variables-in-your-app)
+- [@article@Building an Angular application in various environments using Angular CLI and server](https://medium.com/yavar/building-an-angular-application-in-various-environments-using-angular-cli-and-server-18f94067154b)