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

FROM node:20-alpine AS backend-build
WORKDIR /app/backend
COPY backend/package*.json ./
RUN npm install
COPY backend .
RUN npm run build

FROM node:20-alpine AS prod
WORKDIR /app/backend
COPY backend/package*.json ./
RUN npm install --omit=dev
COPY --from=backend-build /app/backend/dist ./dist
COPY --from=frontend-build /app/frontend/dist ./dist/public
EXPOSE 8080
CMD ["node", "dist/server.js"]