docs: update example documentation

example/README.md

@@ -1,12 +1,29 @@
 # SampleApp
 
+This is an example Angular app showcasing the usage of ts-appversion.
+Note that ts-appversion is in no way bound to Angular. Feel free to use it with any other TypeScript-based framework.
+
 This project was generated with [Angular CLI](https://github.com/angular/angular-cli) version 8.3.9.
 
-## Development server
+## Environments
+
+Based on the environment different version formats are displayed.
+The app will be launched at `http://localhost:4200/`.
+
+### No environment
+
+`npm run start` for a server with no environment.
+
+* The displayed version should be the _latest Git tag_ from @saithodev/ts-appversion project (e.g. v1.3.0)
+
+### Development
+
+`npm run start:dev` for a server with development environment.
 
-Run `ng serve` for a dev server. Navigate to `http://localhost:4200/`. The app will automatically reload if you change any of the source files.
+* The displayed version should be _1.0.0_ (from package.json) with the latest _hash_ of the@saithodev/ts-appversion project (e.g. 1.0.0-gda1e67f)</li>
 
-## Build
+### Production
 
-Run `ng build` to build the project. The build artifacts will be stored in the `dist/` directory. Use the `--prod` flag for a production build.
+`npm run start:prod` for a server with production environment.
 
+* The displayed version should be _1.0.0_ (from package.json)