Try to fix cors issue

webservice/app.py

@@ -34,6 +34,14 @@ def create_app():
     # interface blueprint
     application.register_blueprint(interface_blueprint)
 
+    # CORS: Allow * for developing
+    @application.after_request  # blueprint can also be app~~
+    def after_request(response):
+        header = response.headers
+        header['Access-Control-Allow-Headers'] = 'Content-Type'
+        header['Access-Control-Allow-Origin'] = '*'
+        return response
+
     return application