Dockerfile

# Use an official Python runtime based on Debian 10 "buster" as a parent image.
FROM python:3.12.3-slim-bookworm

# 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 \
    libsqlite3-mod-spatialite \
    libpq-dev \
    libgdal-dev \
    libjpeg62-turbo-dev \
    zlib1g-dev \
    libwebp-dev \
    && rm -rf /var/lib/apt/lists/* \
    && pip install gdal==$(gdal-config --version)

# 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
RUN chown wagtail:wagtail /usr/local/lib/python3.12/

# 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 "elastic 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 "elastic run" command.
# CMD set -xe; python manage.py migrate --noinput; gunicorn application.wsgi:application
CMD gunicorn application.wsgi:application --workers 2 --worker-class gthread --threads 2 --timeout 180 --log-level=info --access-logfile - --access-logformat '%({x-forwarded-for}i)s %(l)s %(u)s %(t)s "%(r)s" %(s)s %(b)s "%(f)s" "%(a)s"'