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Dockerfile
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Dockerfile
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# Use an official Python runtime based on Debian 10 "buster" as a parent image.
FROM python:3.8.1-slim-buster
# Add user that will be used in the container.
RUN useradd wagtail
# Port used by this container to serve HTTP.
EXPOSE 8000
# Set environment variables.
# 1. Force Python stdout and stderr streams to be unbuffered.
# 2. Set PORT variable that is used by Gunicorn. This should match "EXPOSE"
# command.
ENV PYTHONUNBUFFERED=1 \
PORT=8000
# Install system packages required by Wagtail and Django.
RUN apt-get update --yes --quiet && apt-get install --yes --quiet --no-install-recommends \
build-essential \
libpq-dev \
libmariadbclient-dev \
libjpeg62-turbo-dev \
zlib1g-dev \
libwebp-dev \
&& rm -rf /var/lib/apt/lists/*
# Install the application server.
RUN pip install "gunicorn==20.0.4"
# Install the project requirements.
COPY requirements.txt /
RUN pip install -r /requirements.txt
# Use /app folder as a directory where the source code is stored.
WORKDIR /app
# Set this directory to be owned by the "wagtail" user. This Wagtail project
# uses SQLite, the folder needs to be owned by the user that
# will be writing to the database file.
RUN chown wagtail:wagtail /app
# Copy the source code of the project into the container.
COPY --chown=wagtail:wagtail . .
# Use user "wagtail" to run the build commands below and the server itself.
USER wagtail
# Collect static files.
RUN python manage.py collectstatic --noinput --clear
# Runtime command that executes when "docker run" is called, it does the
# following:
# 1. Migrate the database.
# 2. Start the application server.
# WARNING:
# Migrating database at the same time as starting the server IS NOT THE BEST
# PRACTICE. The database should be migrated manually or using the release
# phase facilities of your hosting platform. This is used only so the
# Wagtail instance can be started with a simple "docker run" command.
CMD set -xe; python manage.py migrate --noinput; gunicorn cms.wsgi:application