content: Angular PWA guide is missing the angular.json step for Angular 18+ #4702

URL

https://ionicframework.com/docs/angular/pwa

Issue Description

The guide's only setup step is ng add @angular/pwa, which was accurate before Angular 18 but is no longer sufficient for a project created with ionic start.

Since Angular 18 the pwa schematic writes manifest.webmanifest and the icons to public/ and no longer adds an entry to angular.json. The Ionic starter's angular.json has no public asset glob, so those files are never copied into www/. On a host with a SPA rewrite the 404 is served as index.html and the browser reports Manifest: Line: 1, column: 1, Syntax error.

The page should tell readers to add the public glob to the assets array after running the schematic:

{ "glob": "**/*", "input": "public" }

Note there is deliberately no output key, so the files land at the web root and match the <link rel="manifest" href="manifest.webmanifest"> the schematic injects into index.html.

The ngsw-config.json sample on the page is also stale relative to what Angular 18+ generates and worth refreshing at the same time.

Reported in ionic-team/starters#1888, which covers the starter-side fix.