# 1. Frontend Build Stage
FROM node:20-alpine AS frontend-build
WORKDIR /app/frontend
COPY package*.json ./
RUN npm install
COPY . .
RUN npm run build

# 2. Backend & Serving Stage
FROM python:3.9-slim

# Set working directory
WORKDIR /app

# Install system dependencies (if needed for TA-Lib or others)
# RUN apt-get update && apt-get install -y gcc ...

# Copy backend requirements
COPY ./backend/requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy backend code
COPY ./backend ./backend

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

# Environment variables
ENV PORT=80
EXPOSE 80

# Run FastAPI server
# Assuming main.py is in backend folder and app object is named 'app'
CMD ["uvicorn", "backend.app.main:app", "--host", "0.0.0.0", "--port", "80"]