Dockerfile

# Stage 1: Build React frontend
FROM node:20-alpine AS frontend-build

WORKDIR /app/frontend
COPY frontend/package*.json ./
RUN npm install
COPY frontend/ ./
RUN npm run build

# Stage 2: Set up Python backend
FROM python:3.12-slim

# System deps
RUN apt-get update && apt-get install -y build-essential && rm -rf /var/lib/apt/lists/*

WORKDIR /app/backend
COPY backend/requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt

# Copy backend code
COPY backend/ ./

# Copy React build to backend static folder
COPY --from=frontend-build /app/frontend/build ./frontend/build

# Env vars (you can set them in Docker Space UI too)
ENV FLASK_APP=app.py
ENV FLASK_ENV=production
ENV PORT=7860

EXPOSE 7860

# Start Flask
CMD ["python", "app.py"]