GUACAMOLE-1989: Add the ability to open guacamole as an independent application.

guacamole/src/main/frontend/src/index.html

@@ -28,6 +28,7 @@
         <link rel="icon" type="image/png" href="images/logo-64.png">
         <link rel="icon" type="image/png" sizes="144x144" href="images/logo-144.png">
         <link rel="apple-touch-icon" type="image/png" href="images/logo-144.png">
+        <link rel="manifest" href="manifest.json">
 
         <!-- Web application CSS (bundled by Webpack) -->
         <% for (var index in htmlWebpackPlugin.files.css) { %>

guacamole/src/main/frontend/src/manifest.json

@@ -0,0 +1,24 @@
+{
+    "name": "Guacamole",
+    "short_name": "Guacamole",
+    "description": "Guacamole",
+    "start_url": ".",
+    "display": "standalone",
+    "icons": [
+        {
+            "src": "./images/logo-vector.svg",
+            "type": "image/svg+xml",
+            "sizes": "512x512"
+        },
+        {
+            "src": "./images/logo-512.png",
+            "type": "image/png",
+            "sizes": "512x512"
+        },
+        {
+            "src": "./images/logo-192.png",
+            "type": "image/png",
+            "sizes": "192x192"
+        }
+    ]
+}

guacamole/src/main/frontend/webpack.config.js

@@ -137,6 +137,7 @@ module.exports = {
             { from: 'fonts/**/*' },
             { from: 'images/**/*' },
             { from: 'layouts/**/*' },
+            { from: 'manifest.json' },
             { from: 'translations/**/*' },
             { from: 'verifyCachedVersion.js' }
         ], {