Dockerfile

# ---- Builder image ----
FROM python:3.11-slim AS builder

# ---- Environment ----
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1

# ---- System deps (build-only) ----
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

# ---- Workdir ----
WORKDIR /app

# ---- Install Python deps first (better caching) ----
COPY requirements.txt .
COPY services/datafeed/requirements.txt services/datafeed/requirements.txt
RUN pip install --upgrade pip \
    && pip install --no-cache-dir -r requirements.txt -r services/datafeed/requirements.txt

# ---- Runtime image ----
FROM python:3.11-slim AS runtime

# ---- Environment ----
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1

# ---- Workdir ----
WORKDIR /app

# ---- Copy deps ----
COPY --from=builder /usr/local /usr/local

# ---- Copy only required app code ----
COPY src ./src
COPY services/__init__.py ./services/__init__.py
COPY services/datafeed ./services/datafeed

# ---- Default command (local dev) ----
CMD ["python", "src/manage.py", "runserver", "0.0.0.0:8080"]