Edited: backend.py

Added basic "hello world" get request

backend.py

@@ -1 +1,15 @@
-# Init
+from flask import Flask
+from flask_restful import Resource, Api
+
+app = Flask("LeaderAPI")
+api = Api(app)
+
+class LeaderAPI(Resource):
+
+    def get(self):
+        return "Hello world!"
+
+api.add_resource(LeaderAPI, "/")
+
+if __name__ == "__main__":
+    app.run()