Add Docker support with multi-stage build

- Added `Dockerfile` to streamline application containerization.
- Introduced `.dockerignore` file for better build context management.

.dockerignore

@@ -0,0 +1,16 @@
+__pycache__
+.venv
+.git
+.idea
+.env
+Downloads/
+test_downloads/
+*.pyc
+*.pyo
+*.pyd
+.Python
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/

Dockerfile

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+# Use a specialized uv image for faster dependency management
+FROM ghcr.io/astral-sh/uv:python3.12-bookworm-slim AS builder
+
+# Set the working directory
+WORKDIR /app
+
+# Enable bytecode compilation
+ENV UV_COMPILE_BYTECODE=1
+
+# Copy from the cache instead of linking since it's a multi-stage build
+ENV UV_LINK_MODE=copy
+
+# Install dependencies first (for caching)
+COPY pyproject.toml uv.lock ./
+RUN --mount=type=cache,target=/root/.cache/uv 
+    uv sync --frozen --no-install-project --no-dev
+
+# Final stage
+FROM python:3.12-slim-bookworm
+
+WORKDIR /app
+
+# Copy the environment from the builder
+COPY --from=builder /app/.venv /app/.venv
+
+# Copy the application code
+COPY . .
+
+# Set environment variables
+ENV PATH="/app/.venv/bin:$PATH"
+ENV PYTHONUNBUFFERED=1
+ENV TZ=Asia/Taipei
+
+# Create directory for downloads
+RUN mkdir -p /app/Downloads
+
+# The command to run the bot
+CMD ["python", "bot/tg_bot.py"]