Livebeat is now able to send, store and show beats

backend/models/beat/beat.interface.ts

@@ -0,0 +1,11 @@
+import { Document } from 'mongoose';
+import { IPhone } from '../phone/phone.interface';
+
+export interface IBeat extends Document {
+    coordinate?: number[],
+    accuracy: number,
+    speed: number,
+    battery?: number,
+    phone: IPhone,
+    createdAt?: Date
+}