Fixing root Dockerfile

Author: denismakogon

Dockerfile

@@ -5,5 +5,5 @@ RUN mkdir /code
 ADD . /code/
 RUN pip install -e /code/
 
-WORKDIR /code/samples/hot/json
-ENTRYPOINT ["python3", "app.py"]
+WORKDIR /code/samples/hot/json/echo
+ENTRYPOINT ["python3", "func.py"]