fix: upgrade to Angular v12

add README details

README.md

@@ -1,15 +1,17 @@
-# A11y in Angular demo : A Dumpling Shop
+# Build more accessible Angular apps : Dumpling Shop demo
 
-Demo for the [Build more accessible Angular apps](codelabs.developers.google.com/angular-a11y) codelab.
+Demo for the [Build more accessible Angular apps](https://codelabs.developers.google.com/angular-a11y) codelab.
 
 
 ## Get set up
 
 Run `npm install` to install the dependencies required to run the server.
 
+Run `git checkout get-started` to use the `get-started` branch for the codelab. All solutions can be found in the `main` branch.
+
 Run `ng serve --hmr` to run the server.
 
-Open a browser tab to [http://localhost:4200](). The app will automatically reload if you change any of the source files.
+Open a browser tab to [http://localhost:4200](http://localhost:4200). The app will automatically reload if you change any of the source files.
 
 
 ## Disclaimer

angular.json

@@ -28,7 +28,6 @@
             "main": "src/main.ts",
             "polyfills": "src/polyfills.ts",
             "tsConfig": "tsconfig.app.json",
-            "aot": true,
             "assets": [
               "src/favicon.ico",
               "src/assets"
@@ -36,7 +35,15 @@
             "styles": [
               "src/styles.scss"
             ],
-            "scripts": []
+            "inlineStyleLanguage": "scss",
+            "scripts": [],
+            "vendorChunk": true,
+            "extractLicenses": false,
+            "buildOptimizer": false,
+            "sourceMap": true,
+            "optimization": false,
+            "namedChunks": true,
+            "aot": false
           },
           "configurations": {
             "production": {

package.json

@@ -11,25 +11,25 @@
   },
   "private": true,
   "dependencies": {
-    "@angular/animations": "~12.0.0-next.9",
-    "@angular/cdk": "^12.0.0-next.7",
-    "@angular/common": "^12.0.0-next.9",
-    "@angular/compiler": "^12.0.0-next.9",
-    "@angular/core": "^12.0.0-next.9",
-    "@angular/forms": "^12.0.0-next.9",
-    "@angular/google-maps": "^11.2.6",
-    "@angular/material": "^12.0.0-next.7",
-    "@angular/platform-browser": "^12.0.0-next.9",
-    "@angular/platform-browser-dynamic": "^12.0.0-next.9",
-    "@angular/router": "~12.0.0-next.9",
+    "@angular/animations": "~12.0.0",
+    "@angular/cdk": "^12.0.0",
+    "@angular/common": "^12.0.0",
+    "@angular/compiler": "^12.0.0",
+    "@angular/core": "^12.0.0",
+    "@angular/forms": "^12.0.0",
+    "@angular/google-maps": "^12.0.0",
+    "@angular/material": "^12.0.0",
+    "@angular/platform-browser": "^12.0.0",
+    "@angular/platform-browser-dynamic": "^12.0.0",
+    "@angular/router": "~12.0.0",
     "rxjs": "~6.6.0",
     "tslib": "^2.0.0",
-    "zone.js": "~0.11.3"
+    "zone.js": "~0.11.4"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "~12.0.0-next.9",
-    "@angular/cli": "~12.0.0-next.9",
-    "@angular/compiler-cli": "~12.0.0-next.9",
+    "@angular-devkit/build-angular": "~12.0.0",
+    "@angular/cli": "~12.0.0",
+    "@angular/compiler-cli": "~12.0.0",
     "@types/jasmine": "~3.6.0",
     "@types/node": "^12.11.1",
     "@typescript-eslint/eslint-plugin": "4.16.1",
@@ -49,10 +49,10 @@
     "eslint-plugin-import": "2.22.1",
     "eslint-plugin-jsdoc": "30.7.6",
     "eslint-plugin-prefer-arrow": "1.2.2",
-    "@angular-eslint/builder": "2.0.2",
-    "@angular-eslint/eslint-plugin": "2.0.2",
-    "@angular-eslint/eslint-plugin-template": "2.0.2",
-    "@angular-eslint/schematics": "2.0.2",
-    "@angular-eslint/template-parser": "2.0.2"
+    "@angular-eslint/builder": "^4.0.0",
+    "@angular-eslint/eslint-plugin": "^4.0.0",
+    "@angular-eslint/eslint-plugin-template": "^4.0.0",
+    "@angular-eslint/schematics": "12.0.0",
+    "@angular-eslint/template-parser": "^4.0.0"
   }
 }

src/environments/environment.ts

@@ -28,4 +28,4 @@ export const environment = {
  * This import should be commented out in production mode because it will have a negative impact
  * on performance if an error is thrown.
  */
-// import 'zone.js/dist/zone-error';  // Included with Angular CLI.
+// import 'zone.js/plugins/zone-error';  // Included with Angular CLI.

src/polyfills.ts

@@ -72,7 +72,7 @@
 /***************************************************************************************************
  * Zone JS is required by default for Angular itself.
  */
-import 'zone.js/dist/zone';  // Included with Angular CLI.
+import 'zone.js';  // Included with Angular CLI.
 
 
 /***************************************************************************************************

src/test.ts

@@ -15,7 +15,7 @@
  */
 // This file is required by karma.conf.js and loads recursively all the .spec and framework files
 
-import 'zone.js/dist/zone-testing';
+import 'zone.js/testing';
 import { getTestBed } from '@angular/core/testing';
 import {
   BrowserDynamicTestingModule,