Add production Docker deployment

Dockerfile

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+# syntax=docker/dockerfile:1
+
+FROM --platform=$BUILDPLATFORM oven/bun:1.3.13-alpine AS frontend-builder
+
+WORKDIR /app
+
+COPY package.json bun.lock ./
+RUN bun install --frozen-lockfile
+
+COPY frontend ./frontend
+COPY vite.config.js ./
+RUN bun run build
+
+
+FROM ghcr.io/astral-sh/uv:0.9.5-python3.12-bookworm-slim AS runtime
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    UV_COMPILE_BYTECODE=1 \
+    UV_LINK_MODE=copy \
+    PATH="/app/.venv/bin:$PATH"
+
+WORKDIR /app
+
+COPY pyproject.toml uv.lock ./
+RUN uv sync --frozen --no-dev
+
+RUN useradd --create-home --uid 10001 appuser
+
+COPY --chown=appuser:appuser app.py ./
+COPY --chown=appuser:appuser templates ./templates
+COPY --chown=appuser:appuser static/assets ./static/assets
+COPY --from=frontend-builder --chown=appuser:appuser /app/static/dist ./static/dist
+
+USER appuser
+
+EXPOSE 8000
+
+CMD ["gunicorn", "--bind", "0.0.0.0:8000", "--workers", "2", "--threads", "4", "--access-logfile", "-", "--error-logfile", "-", "app:app"]