Copy Pastes from Docker’s Get Started doc Create image, manage containers, docker cloud https://docker.github.io/get-started/part2/#log-in-with-your-docker-id Dockerfile Create an empty directory. Change directories ( cd ) into the new directory, create a file called Dockerfile , copy-and-paste the following content into that file, and save it. Take note of the comments that explain each statement in your new Dockerfile. # Use an official Python runtime as a parent image FROM python: 2 . 7 -slim # Set the working directory to /app WORKDIR /app # Copy the current directory contents into the container at /app ADD . /app # Install any needed packages specified in requirements.txt RUN pip install -r requirements.txt # Make port 80 available to the world outside this container EXPOSE 80 # Define environment variable ENV NAME World # Run app.py when the container launches CMD [ "python" , "app.py" ] requirements.txt Flask Redis app.py from flask import Fla