Add script to deploy the app to github.io

Author: railsstudent

package.json

@@ -7,7 +7,9 @@
     "build": "ng build",
     "test": "ng test",
     "lint": "ng lint",
-    "e2e": "ng e2e"
+    "e2e": "ng e2e",
+    "deploy":
+      "ng build --prod --base-href \"https://railsstudent.github.io/ng-fun-prog/\" && ngh --no-silent"
   },
   "private": true,
   "dependencies": {