Create manifest.json

Adding further context to the website and allowing add to home screen functionality.

Author: FintanK

Diff for: manifest.json

@@ -0,0 +1,7 @@
+{
+  "name": "JS The Right Way",
+  "icons": [],
+  "start_url": "index.html",
+  "display": "standalone",
+  "orientation": "portrait"
+}