backend: add db initializer logic

- Add some logging to DB Client

Create a db initializer #4

backend/src/server.py

@@ -16,7 +16,7 @@ database = DBClient()
 @app.route('/login', methods=['POST'])
 def login():
     if request.is_json:
-        return request.json, 200
+        return jsonify({"hello": "user"}), 200
     else:
         return jsonify({'error': 'Request must contain JSON data'}), 400