Merge pull request #602 from dvdpearson/dev

Dynamize manifest.json with configurable options

internal/glance/static/manifest.json

@@ -1,14 +0,0 @@
-{
-    "name": "Glance",
-    "display": "standalone",
-    "background_color": "#151519",
-    "scope": "/",
-    "start_url": "/",
-    "icons": [
-        {
-            "src": "app-icon.png",
-            "type": "image/png",
-            "sizes": "512x512"
-        }
-    ]
-}