add assets icons use to flet web page

app/main.py

@@ -343,4 +343,4 @@ def main(page: ft.Page):
 
 if __name__ == "__main__":
     port = int(os.getenv("PORT", 7860))
-    ft.app(target=main, view=ft.AppView.WEB_BROWSER, host="0.0.0.0", port=port)
+    ft.app(target=main, view=ft.AppView.WEB_BROWSER, host="0.0.0.0", port=port, assets_dir="../assets")

assets/site.webmanifest

@@ -1 +1,19 @@
-{"name":"","short_name":"","icons":[{"src":"/android-chrome-192x192.png","sizes":"192x192","type":"image/png"},{"src":"/android-chrome-512x512.png","sizes":"512x512","type":"image/png"}],"theme_color":"#ffffff","background_color":"#ffffff","display":"standalone"}
+{
+    "name": "Maker Station",
+    "short_name": "MakerStation",
+    "icons": [
+        {
+            "src": "/icon192x192.png",
+            "sizes": "192x192",
+            "type": "image/png"
+        },
+        {
+            "src": "/icon-512x512.png",
+            "sizes": "512x512",
+            "type": "image/png"
+        }
+    ],
+    "theme_color": "#1a1c1e",
+    "background_color": "#1a1c1e",
+    "display": "standalone"
+}