Mock the backend API calls

This allows developer to test the UI without the need of backend

Issue-ID: NONRTRIC-355
Change-Id: I38a2d16234a727236ba93ec78ba62b17eeb4dc34
Signed-off-by: Lathish <lathishbabu.ganesan@est.tech>
diff --git a/webapp-frontend/package.json b/webapp-frontend/package.json
index a88e1f2..95ff727 100644
--- a/webapp-frontend/package.json
+++ b/webapp-frontend/package.json
@@ -4,6 +4,7 @@
   "scripts": {
     "ng": "ng",
     "start": "ng serve --proxy-config proxy.conf.json",
+    "start:mock": "ng serve --configuration=mock",
     "build": "ng build",
     "test": "ng test",
     "lint": "ng lint",