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# Dockerfile for Hugging Face Spaces
# Based on HF Spaces Docker SDK documentation: https://huggingface.co/docs/hub/spaces-sdks-docker
FROM python:3.10-slim
# Set working directory
WORKDIR /app
# Install system dependencies
RUN apt-get update && apt-get install -y \
gcc \
g++ \
cmake \
libopenblas-dev \
libomp-dev \
curl \
&& rm -rf /var/lib/apt/lists/*
# Create app user with UID 1000 (fixes getpwuid(): uid not found: 1000 error)
# Note: Hugging Face Spaces may run as root, but creating user prevents errors
# Use || true to allow graceful failure if user already exists
RUN (useradd -u 1000 -m -s /bin/bash appuser 2>/dev/null) || \
(groupadd -g 1000 appuser 2>/dev/null && useradd -u 1000 -g appuser -m -s /bin/bash appuser 2>/dev/null) || \
echo "User creation skipped (may already exist)"
# Create cache directories with proper permissions
# Hugging Face Spaces runs as root, but we ensure appuser can access
RUN mkdir -p /tmp/huggingface_cache && \
chmod 777 /tmp/huggingface_cache && \
mkdir -p /tmp/logs && \
chmod 777 /tmp/logs && \
(chown -R appuser:appuser /tmp/huggingface_cache /tmp/logs 2>/dev/null || true)
# Copy requirements file first (for better caching)
COPY requirements.txt .
# Install Python dependencies
RUN pip install --no-cache-dir --upgrade pip && \
pip install --no-cache-dir -r requirements.txt
# Copy application code
COPY . .
# Set ownership of application files (if running as root, this ensures appuser can access)
# Use || true to allow graceful failure if chown not needed
RUN chown -R appuser:appuser /app 2>/dev/null || true
# Expose port 7860 (HF Spaces standard)
EXPOSE 7860
# Set environment variables
ENV PYTHONUNBUFFERED=1
ENV PORT=7860
# Set OMP_NUM_THREADS to valid integer (not empty string)
ENV OMP_NUM_THREADS=4
ENV MKL_NUM_THREADS=4
ENV DB_PATH=/tmp/sessions.db
ENV FAISS_INDEX_PATH=/tmp/embeddings.faiss
ENV LOG_DIR=/tmp/logs
ENV RATE_LIMIT_ENABLED=true
# Cache directories - will be used by transformers and huggingface_hub
ENV HF_HOME=/tmp/huggingface_cache
ENV TRANSFORMERS_CACHE=/tmp/huggingface_cache
# Health check
HEALTHCHECK --interval=30s --timeout=30s --start-period=120s --retries=3 \
CMD curl -f http://localhost:7860/api/health || exit 1
# Run with Gunicorn production WSGI server (replaces Flask dev server)
CMD ["gunicorn", "--bind", "0.0.0.0:7860", "--workers", "4", "--threads", "2", "--timeout", "120", "--access-logfile", "-", "--error-logfile", "-", "--log-level", "info", "flask_api_standalone:app"]
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