Dockerfile

#################### builder stage ####################
FROM python:3.9-slim AS builder
WORKDIR /build

COPY requirements.txt .
RUN pip install --prefix=/install -r requirements.txt

COPY app.py .
RUN python -m compileall -b -f app.py
RUN tar -C /build -czf /build/app.tgz app.pyc

#################### final stage ####################
FROM python:3.9-slim
WORKDIR /app

# 1. Install dependencies
COPY --from=builder /install /usr/local/

# 2. Copy the bytecode tarball into writable /tmp
COPY --from=builder /build/app.tgz /tmp/app.tgz

# 3. Add entrypoint
COPY entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh

EXPOSE 7860
ENTRYPOINT ["/entrypoint.sh"]