Annotated Dockerfile for a Flask / Python application

Dockerfile

# Set a base Docker image to inherit from
FROM ubuntu:14.04

# This isn't required, but give yourself some credit
MAINTAINER Your Name Here <Your Email Here>

# If you get a library from Homebrew (or `apt-get`) to run it locally, add it to
# this list and Docker will install it with `apt-get`.
RUN DEBIAN_FRONTEND=noninteractive apt-get update --fix-missing && apt-get install -y \
  bcrypt \
  build-essential \
  git \
  libffi-dev \
  libjpeg-dev \
  libpng-dev \
  libpq-dev \
  libssl-dev \
  python \
  python-dev \
  python-setuptools \
  rsyslog \
  supervisor \
  vim \
  wget

# Create directories in the container for logs and source code
RUN mkdir /var/log/gunicorn && mkdir /var/log/deploys
RUN mkdir /opt/code

# Add and install everything listed in `requirements.txt`
RUN easy_install pip
COPY ./app/files/requirements.txt /opt/code/
RUN pip install -r /opt/code/requirements.txt

# Expose port 80 as the default for flask apps
EXPOSE 80

# Set `opt/code` as the default directory for future instructions (i.e. `CMD`)
WORKDIR /opt/code

# Start the application with `supervisord`
CMD supervisord -c /etc/supervisor/conf.d/supervisord.conf