Adding manifest.json (basic PWA support)

client/index.html

@@ -11,6 +11,7 @@
   <script src="katex/katex.min.js"></script>
   <script src="katex/contrib/auto-render.min.js"></script>
   <link id="highlight-link" rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/hybrid.min.css">
+  <link rel="manifest" href="manifest.json">
   <script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/highlight.min.js"></script>
 </head>
 

client/manifest.json

@@ -0,0 +1,40 @@
+{
+  "short_name": "HC",
+  "name": "Hack-Chat",
+  "icons": [
+      {
+          "src": "imgs/android-icon-36x36.png",
+          "sizes": "36x36",
+          "type": "image/png"
+      },
+      {
+          "src": "imgs/android-icon-48x48.png",
+          "sizes": "48x48",
+          "type": "image/png"
+      },
+      {
+          "src": "imgs/android-icon-72x72.png",
+          "sizes": "72x72",
+          "type": "image/png"
+      },
+      {
+          "src": "imgs/android-icon-96x96.png",
+          "sizes": "96x96",
+          "type": "image/png"
+      },
+      {
+          "src": "imgs/android-icon-144x144.png",
+          "sizes": "144x144",
+          "type": "image/png"
+      },
+      {
+          "src": "imgs/android-icon-192x192.png",
+          "sizes": "192x192",
+          "type": "image/png"
+      }
+  ],
+  "start_url": "./",
+  "display": "minimal-ui",
+  "theme_color": "#a6a28c",
+  "background_color": "#ffffff"
+}