Dockerfile

# syntax=docker/dockerfile:1
FROM python:3.11-slim

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1

WORKDIR /app

# System deps (optional: gcc for any wheels if needed)
RUN apt-get update && apt-get install -y --no-install-recommends \
    ca-certificates \
    libeccodes0 \
    && rm -rf /var/lib/apt/lists/*

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

COPY app ./app

ENV PORT=7860
EXPOSE 7860

# Use shell form so $PORT expands at runtime
CMD ["sh", "-c", "python -m uvicorn app.main:app --host 0.0.0.0 --port ${PORT:-7860}"]