appview/pages: add png icons to pwa manifest

this is required since firefox apparently doesn't
support png icons (in my testing)

flake.nix change just copies the files into the static
directory since its untracked.

Signed-off-by: afterlifepro <[e-mail]>

appview/state/state.go

···
   "icons": [
     {
       "src": "/favicon.svg",
+			"type": "image/xml+svg",
+      "sizes": "any",
+			"purpose": "any"
+    },
+    {
+      "src": "/static/pwa-512.png",
+			"type": "image/png",
+      "sizes": "512x512"
+    },
+    {
+      "src": "/static/pwa-192.png",
+			"type": "image/png",
+      "sizes": "192x192"
+    },
+    {
+      "src": "/static/pwa-144.png",
+			"type": "image/png",
       "sizes": "144x144"
+    },
+    {
+      "src": "/static/pwa-96.png",
+			"type": "image/png",
+      "sizes": "96x96"
+    },
+    {
+      "src": "/static/pwa-72.png",
+			"type": "image/png",
+      "sizes": "72x72"
+    },
+    {
+      "src": "/static/pwa-48.png",
+			"type": "image/png",
+      "sizes": "48x48"
     }
   ],
   "start_url": "/",

flake.nix

···
           mkdir -p appview/pages/static
           # no preserve is needed because watch-tailwind will want to be able to overwrite
           cp -fr --no-preserve=ownership ${packages'.appview-static-files}/* appview/pages/static
+          cp -fr appview/pages/pwa-icons/* appview/pages/static
           export TANGLED_OAUTH_JWKS="$(${packages'.genjwks}/bin/genjwks)"
         '';
         env.CGO_ENABLED = 1;
···
         program = toString (pkgs.writeShellScript "watch-appview" ''
           echo "copying static files to appview/pages/static..."
           ${pkgs.coreutils}/bin/cp -fr --no-preserve=ownership ${packages'.appview-static-files}/* appview/pages/static
+          ${pkgs.coreutils}/bin/cp -fr appview/pages/pwa-icons/* appview/pages/static
           ${air-watcher "appview" ""}/bin/run
         '');
       };