add the heading to the inbound structure

src/inbound/models/flightstate.model.ts

@@ -21,6 +21,12 @@ export class FlightState {
   })
   groundSpeed: number;
 
+  @Prop({
+    required: true,
+    type: Number,
+  })
+  heading: number;
+
   @Prop({
     required: true,
     type: Number,