Dockerfile

# apps/server/Dockerfile

FROM python:3.11-slim AS base
ENV PYTHONDONTWRITEBYTECODE=1 PYTHONUNBUFFERED=1
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    && rm -rf /var/lib/apt/lists/*
WORKDIR /app

FROM base AS builder
COPY requirements.txt /app/requirements.txt
RUN pip install --upgrade pip && \
    pip wheel --no-cache-dir --wheel-dir /app/wheels -r /app/requirements.txt

FROM python:3.11-slim AS runtime
ENV PYTHONDONTWRITEBYTECODE=1 PYTHONUNBUFFERED=1
# add runtime libs you actually need; xgboost often needs libgomp1
RUN apt-get update && apt-get install -y --no-install-recommends \
    libgomp1 \
    && rm -rf /var/lib/apt/lists/*
WORKDIR /app

# deps
COPY --from=builder /app/wheels /wheels
RUN pip install --no-cache-dir /wheels/* && rm -rf /wheels

# app source
COPY . /app

# non-root
RUN useradd -m appuser
USER appuser

ENV PORT=7860
EXPOSE 7860

CMD ["sh", "-c", "uvicorn main:app --host 0.0.0.0 --port ${PORT}"]