Dockerfile

FROM python:3.11-slim

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

# OS deps
RUN apt-get update && apt-get install -y --no-install-recommends \
    ffmpeg libsndfile1 && rm -rf /var/lib/apt/lists/*

# Force all caches to writable, persistent storage
ENV HF_HOME=/data/hf
ENV HUGGINGFACE_HUB_CACHE=/data/hf
ENV XDG_CACHE_HOME=/data/.cache
RUN mkdir -p /data/hf /data/.cache && chmod -R 777 /data

# Pre-download the tiny.en model into /data to avoid runtime writes
RUN python - <<'PY'
from faster_whisper.utils import download_model
download_model("tiny.en", cache_dir="/data/hf")
print("Model pre-fetched into /data/hf")
PY

COPY app.py .

ENV PORT=7860
CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]