Dockerfile

# Set the Python version as a build-time argument 
# with Python 3.12 as the default
ARG PYTHON_VERSION=3.12-slim-bullseye
FROM python:${PYTHON_VERSION}

# Create a virtual environment
RUN python -m venv /opt/venv

# Set the virtual environment as the current location
ENV PATH=/opt/venv/bin:$PATH

# Upgrade pip
RUN pip install --upgrade pip

# Set Python-related environment variables
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1

# Install system dependencies
RUN apt-get update && apt-get install -y \
    # for postgres
    libpq-dev \
    # for Pillow
    libjpeg-dev \
    # for CairoSVG
    libcairo2 \
    # other
    gcc \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Install Node.js and npm
RUN curl -fsSL https://deb.nodesource.com/setup_22.x | bash - && \
    apt-get install -y nodejs && \
    npm install -g npm@latest

# Create the application directory
RUN mkdir -p /code

# Set the working directory
WORKDIR /code

# Copy Python dependencies
COPY requirements.txt /tmp/requirements.txt

# Copy Node.js dependencies
COPY package.json package-lock.json /code/

# Copy Tailwind Config file
COPY tailwind.config.js /code

# Copy the application code
COPY ./src /code/src

# Install Python and Node.js dependencies
RUN pip install -r /tmp/requirements.txt
RUN npm ci

# Set environment variables for Django
ARG DJANGO_SECRET_KEY
ENV DJANGO_SECRET_KEY=${DJANGO_SECRET_KEY}

ARG DJANGO_DEBUG=0
ENV DJANGO_DEBUG=${DJANGO_DEBUG}

# Static files collection
RUN npm run tailwind:build
RUN cd ./src && python manage.py collectstatic --noinput

# Set the working directory on /code/src
WORKDIR /code/src

# Set the default project name
ARG PROJ_NAME="home"

# Create a bash script to run the Django project
# this script will execute at runtime when
# the container starts and the database is available
RUN printf "#!/bin/bash\n" > ./paracord_runner.sh && \
    printf "RUN_PORT=\"\${PORT:-8000}\"\n\n" >> ./paracord_runner.sh && \
    printf "python manage.py migrate --no-input\n" >> ./paracord_runner.sh && \
    printf "gunicorn ${PROJ_NAME}.wsgi:application --bind \"0.0.0.0:\$RUN_PORT\"\n" >> ./paracord_runner.sh

# Make the script executable
RUN chmod +x paracord_runner.sh

# Clean up apt cache to reduce image size
RUN apt-get remove --purge -y \
    && apt-get autoremove -y \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/*

# Run the Django project via the runtime script
# when the container starts
CMD ./paracord_runner.sh