docs: switch to esbuild and sync project.json with latest one

Author: rainerhahnekamp

projects/example-app/project.json

@@ -7,12 +7,12 @@
   "generators": {},
   "targets": {
     "build": {
-      "executor": "@angular-devkit/build-angular:browser",
+      "executor": "@angular-devkit/build-angular:application",
       "options": {
         "outputPath": "dist/projects/example-app",
         "index": "projects/example-app/src/index.html",
-        "main": "projects/example-app/src/main.ts",
-        "polyfills": "projects/example-app/src/polyfills.ts",
+        "browser": "projects/example-app/src/main.ts",
+        "polyfills": ["zone.js"],
         "tsConfig": "projects/example-app/tsconfig.app.json",
         "assets": [
           "projects/example-app/src/favicon.ico",
@@ -24,20 +24,23 @@
       "configurations": {
         "production": {
           "budgets": [
+            {
+              "type": "initial",
+              "maximumWarning": "500kb",
+              "maximumError": "1mb"
+            },
             {
               "type": "anyComponentStyle",
-              "maximumWarning": "6kb"
+              "maximumWarning": "2kb",
+              "maximumError": "4kb"
             }
           ],
           "outputHashing": "all"
         },
         "development": {
-          "buildOptimizer": false,
           "optimization": false,
-          "vendorChunk": true,
           "extractLicenses": false,
-          "sourceMap": true,
-          "namedChunks": true
+          "sourceMap": true
         }
       },
       "defaultConfiguration": "production",