# -------- fase build --------
FROM node:20-alpine AS builder
WORKDIR /app

COPY package*.json ./
RUN npm ci

COPY tsconfig.json ./tsconfig.json
COPY src ./src
RUN npm run build            # genera /app/dist

# -------- fase runtime ------
FROM node:20-alpine
WORKDIR /app
ENV NODE_ENV=production

# installa solo dipendenze runtime
COPY --from=builder /app/package*.json ./
RUN npm ci --omit=dev

# copia codice compilato e variabili
COPY --from=builder /app/dist ./dist
COPY .env .env

EXPOSE 6789
CMD ["node", "dist/index.js"]