adds install button

src/main/resources/META-INF/resources/manifest.json

@@ -0,0 +1,18 @@
+{
+  "name": "Dice-Tower",
+  "icons": [
+    {
+      "src": "192.png",
+      "type": "image/png",
+      "sizes": "192x192"
+    },
+    {
+      "src": "512.png",
+      "type": "image/png",
+      "sizes": "512x512"
+    }
+  ],
+  "start_url": "/",
+  "display_override": ["window-controls-overlay", "minimal-ui"],
+  "display": "standalone"
+}

src/main/resources/META-INF/resources/style.css

@@ -32,6 +32,22 @@ button:active {
     background: #222222;
 }
 
+#install {
+    padding: 10px;
+    border: #666666 3px solid;
+    border-radius: 10px;
+    background: #666666;
+    color: #fff
+}
+
+#install:hover {
+    background: #444444;
+}
+
+#install:active {
+    background: #222222;
+}
+
 input {
     margin: 10px;
 }