Add basic manifest.json

static/manifest.json

@@ -0,0 +1,8 @@
+{
+    "name": "#PBW23 Explore",
+    "theme_color": "#ff1616",
+    "background_color": "#FF1616",
+    "display": "browser",
+    "scope": "/",
+    "start_url": "/"
+  }