FROM node:20-slim AS frontend-builder

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

FROM node:20-slim AS backend

WORKDIR /app
COPY package*.json ./
RUN npm install --production

WORKDIR /app/backend
COPY backend/package*.json ./
RUN npm install --production
COPY backend/ ./

# Copy frontend build
COPY --from=frontend-builder /app/frontend/dist /app/frontend/dist

EXPOSE 3001

CMD ["node", "server.js"]