Add waitress + caddy deployment

Dockerfile

@@ -1,11 +1,50 @@
-FROM python:3.11-alpine
+# Multi-stage build example for HXBooks
+FROM ghcr.io/astral-sh/uv:python3.14-alpine AS builder
+ENV UV_COMPILE_BYTECODE=1 UV_LINK_MODE=copy
+
+# Omit development dependencies
+ENV UV_NO_DEV=1
+
+# Disable Python downloads, because we want to use the system interpreter
+# across both images. If using a managed Python version, it needs to be
+# copied from the build image into the final image; see `standalone.Dockerfile`
+# for an example.
+ENV UV_PYTHON_DOWNLOADS=0
 
 WORKDIR /app
-COPY requirements.txt .
-RUN pip install -r requirements.txt
-COPY . .
-RUN pip install -e .
+RUN --mount=type=cache,target=/root/.cache/uv \
+    --mount=type=bind,source=uv.lock,target=uv.lock \
+    --mount=type=bind,source=pyproject.toml,target=pyproject.toml \
+    uv sync --locked --no-install-project
+COPY . /app
+RUN --mount=type=cache,target=/root/.cache/uv \
+    uv sync --locked
 
-EXPOSE 8080
+# Then, use a final image without uv
+FROM python:3.14-alpine
+# It is important to use the image that matches the builder, as the path to the
+# Python executable must be the same, e.g., using `python:3.11-slim-bookworm`
+# will fail.
 
-CMD ["gunicorn", "--bind", "0.0.0.0:8080", "hxbooks:create_app()"]
+# Copy the application from the builder
+COPY --from=builder /app /app
+
+# Copy and setup entrypoint script
+COPY docker-entrypoint.sh /usr/local/bin/
+RUN chmod +x /usr/local/bin/docker-entrypoint.sh
+
+# Create shared directories for volumes
+RUN mkdir -p /shared/static
+
+# Place executables in the environment at the front of the path
+ENV PATH="/app/.venv/bin:$PATH"
+
+# Set Flask app for migrations
+ENV FLASK_APP="src.hxbooks.app:create_app()"
+
+# Use `/app` as the working directory
+WORKDIR /app
+
+# Set entrypoint and default command
+ENTRYPOINT ["docker-entrypoint.sh"]
+CMD ["hxbooks", "serve", "--host", "0.0.0.0", "--port", "5000"]