Dockerfile

# Use Python 3.12 slim for a smaller image
FROM python:3.12-slim

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1
ENV PORT=7860

# Install system dependencies including Rust toolchain requirements and build tools
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    curl \
    git \
    pkg-config \
    libssl-dev \
    && rm -rf /var/lib/apt/lists/*

# Install Rust
RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
ENV PATH="/root/.cargo/bin:${PATH}"

# Set the working directory
WORKDIR /app

# Copy dependency files
COPY pyproject.toml ./

# Install Python dependencies
# Using uv for faster builds
RUN pip install --no-cache-dir uv && \
    uv pip install --system --no-cache .

# Copy the rest of the application
COPY . .

# Build the Rust engine
RUN maturin develop --manifest-path engine_rust_src/Cargo.toml --release

# Compile card data
RUN python -m compiler.main

# Create a non-privileged user (required for some HF Space environments)
RUN useradd -m -u 1000 user
USER user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

# Expose the port used by Hugging Face Spaces
EXPOSE 7860

# Run the server
# HF Spaces expects the app to listen on 0.0.0.0:7860
CMD ["python", "backend/server.py"]