FROM python:3.11-slim

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    HF_HOME=/tmp/huggingface \
    TRANSFORMERS_CACHE=/tmp/huggingface \
    HOME=/tmp \
    PORT=7860

WORKDIR /app

COPY requirements.txt .

RUN python -m pip install --no-cache-dir --upgrade pip \
    && python -m pip install --no-cache-dir --index-url https://download.pytorch.org/whl/cpu torch torchvision \
    && python -m pip install --no-cache-dir -r requirements.txt

COPY . .

EXPOSE 7860

CMD ["python", "-u", "backend.py"]