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/tsconfig.json b/webapp-frontend/tsconfig.json
index 457bef4..a94b5b6 100644
--- a/webapp-frontend/tsconfig.json
+++ b/webapp-frontend/tsconfig.json
@@ -11,6 +11,7 @@
     "emitDecoratorMetadata": true,
     "experimentalDecorators": true,
     "importHelpers": true,
+    "resolveJsonModule": true,
     "target": "es5",
     "typeRoots": [
       "node_modules/@types"