initialize docker build

Dockerfile

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+FROM python:3.13-slim
+
+EXPOSE 8000
+WORKDIR /app
+
+ENV PATH="/app/.venv/bin:$PATH"
+ENV STATIC_ROOT=/app/staticfiles
+ENV MEDIA_ROOT=/data/media
+# Set Caddy's XDG base directory to a writable location
+ENV XDG_DATA_HOME=/app/run/caddy/data
+ENV XDG_CONFIG_HOME=/app/run/caddy/config
+
+# Install system dependencies including Caddy
+RUN apt-get update && apt-get install -y \
+    debian-keyring \
+    debian-archive-keyring \
+    apt-transport-https \
+    curl \
+    && curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/gpg.key' | gpg --dearmor -o /usr/share/keyrings/caddy-stable-archive-keyring.gpg \
+    && curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/debian.deb.txt' | tee /etc/apt/sources.list.d/caddy-stable.list \
+    && apt-get update \
+    && apt-get install -y caddy procps \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install binaries with correct permissions
+COPY --from=ghcr.io/astral-sh/uv:latest --chown=root:root --chmod=755 /uv /usr/local/bin/uv
+COPY --chmod=755 docker/run.sh /usr/local/bin/run.sh
+
+COPY docker/Caddyfile /app/config/caddy/Caddyfile
+ADD . /app
+
+RUN uv sync --frozen \
+    && uv pip install gunicorn --no-cache-dir \
+    && mkdir -p /app/config/caddy /app/run/caddy /app/run/gunicorn \
+    && chgrp -R 0 /app \
+    && chmod -R g=u /app \
+    && chmod g+w /app/config/caddy/Caddyfile
+    # && SECRET_KEY= uv run src/manage.py collectstatic --noinput
+
+CMD ["/usr/local/bin/run.sh"]