Optimizations and manifest

docs/manifest.json

@@ -0,0 +1,14 @@
+{
+  "name": "30 seconds of code",
+  "short_name": "30s of code",
+  "start_url": "./index.html",
+  "display": "standalone",
+  "background_color": "#f8f8f8",
+  "theme_color": "#111",
+  "description": "Curated collection of useful JavaScript snippets that you can understand in 30 seconds or less.",
+  "icons": [{
+    "src": "favicon.png",
+    "sizes": "128x128",
+    "type": "image/png"
+  }]
+}