Dockerfile

# ── Stage 1: Build React frontend ──
FROM node:20-alpine AS frontend-build
WORKDIR /app/frontend
COPY frontend/package.json frontend/package-lock.json ./
RUN npm ci
COPY frontend/ ./
RUN npm run build

# ── Stage 2: Python backend + serve built frontend ──
FROM python:3.11-slim
WORKDIR /app

# Install Python dependencies
COPY backend/requirements.txt ./requirements.txt
RUN pip install --no-cache-dir -r requirements.txt

# Copy backend source
COPY backend/ ./

# Copy built frontend from stage 1
COPY --from=frontend-build /app/frontend/dist ./static

# Railway injects PORT as env var (default 8000)
ENV PORT=8000

EXPOSE ${PORT}

CMD ["sh", "-c", "uvicorn main:app --host 0.0.0.0 --port ${PORT:-8000}"]