Build an app the Docker way! No worry about Environment setup on different machines. Content extracted from Docker Doc.
Define a container with Dockerfile
Just like other ‘setting’ files, Dockerfile defines how the app runs in such environment.
A Dockerfile is placed into the working directory as followings:
# 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
COPY . /app
# Install any needed packages specified in requirements.txt
RUN pip install --trusted-host pypi.python.org -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"]