Dockerfile

# ---- base build ----
FROM python:3.11-slim AS base
ENV PYTHONDONTWRITEBYTECODE=1 PYTHONUNBUFFERED=1

# system deps
RUN apt-get update && apt-get install -y --no-install-recommends git && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# copy metadata first (better caching)
COPY pyproject.toml README.md ./
COPY src ./src
COPY app.py ./app.py

# install package
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -e .

# ---- runtime ----
FROM python:3.11-slim AS runtime
ENV PYTHONDONTWRITEBYTECODE=1 PYTHONUNBUFFERED=1
WORKDIR /app

COPY --from=base /usr/local/lib/python3.11 /usr/local/lib/python3.11
COPY --from=base /usr/local/bin /usr/local/bin
COPY --from=base /app /app

EXPOSE 7860
CMD ["streamlit", "run", "app.py", "--server.port=7860", "--server.address=0.0.0.0"]