FROM node:20-alpine AS base
WORKDIR /app
COPY package*.json ./

FROM base AS deps
RUN npm ci --only=production

FROM base AS builder
RUN npm ci
COPY . .
RUN npm run build

FROM node:20-alpine AS runner
WORKDIR /app
ENV NODE_ENV=production
RUN addgroup --system --gid 1001 nodejs && adduser --system --uid 1001 appuser
COPY --from=deps /app/node_modules ./node_modules
COPY --from=builder /app/dist ./dist
COPY package.json ./
USER appuser
EXPOSE 3001
CMD ["node", "dist/index.js"]