[code] created manifest.json file for progressive web application (PWA) functionality (file is not complete) implemented link tags for styles.css and manifest.json in home.html and transport.html pages.

manifest.json

@@ -0,0 +1,17 @@
+{
+  "short_name": "Sentinel",
+  "name": "Sentinel",
+  "icons": [
+    {
+      "src": "/",
+      "type": "image/svg+xml",
+      "sizes": "512x512"
+    }
+  ],
+  "id": "/?source=pwa",
+  "start_url": "/?source=pwa",
+  "background_color": "#000000",
+  "display": "standalone",
+  "scope": "/",
+  "theme_color": "#000000"
+}