Expose port

Dockerfile

@@ -8,5 +8,6 @@ WORKDIR /docker-flask-test
 ADD . /docker-flask-test
 # run pip to install the dependencies of the flask app
 RUN pip install -r requirements.txt
+EXPOSE 5000
 # define the command to start the container
-CMD ["python","app.py"]
+CMD ["python","app.py"]