FROM node:20-slim AS deps
WORKDIR /app
COPY package.json ./
RUN npm install

FROM node:20-slim AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .
RUN npm run build

FROM node:20-slim AS runner
WORKDIR /app
ENV NODE_ENV=production
COPY --from=builder /app/.next ./.next
COPY --from=builder /app/node_modules ./node_modules
COPY --from=builder /app/package.json ./package.json
COPY --from=builder /app/next.config.js ./next.config.js
COPY --from=builder /app/public ./public

EXPOSE 3000
CMD ["npm", "start"]
