Dockerfile

FROM python:3.9-slim

# System deps
RUN apt-get update && apt-get install -y ffmpeg git && rm -rf /var/lib/apt/lists/*

WORKDIR /app/chatbot
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Create writable directories
RUN mkdir -p /data/hf_cache /data/transformers_cache /data/nltk_data /static/audio
RUN chmod -R 777 /static/audio

# Set environment variables
ENV HF_HOME=/data/hf_cache
ENV TRANSFORMERS_CACHE=/data/transformers_cache
ENV NLTK_DATA=/data/nltk_data
ENV AUDIO_FOLDER=/data/audio

# Copy source
COPY . .

EXPOSE 5000

# Run via a production WSGI server (you can also use gunicorn or waitress)
CMD ["waitress-serve", "--listen=0.0.0.0:5000", "app:app"]