Dockerfile

# Stage 1: Dependencies
FROM node:20-alpine AS deps

WORKDIR /app

COPY package*.json ./
RUN npm ci --only=production

# Stage 2: Builder
FROM node:20-alpine AS builder

WORKDIR /app

COPY package*.json ./
RUN npm ci

ARG NEXT_PUBLIC_API_URL
ENV NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}

COPY . .
RUN npm run build

# Stage 3: Runtime
FROM node:20-alpine AS runner

WORKDIR /app

ENV NODE_ENV=production

RUN addgroup -g 1001 -S nodejs && \
    adduser -S nextjs -u 1001

COPY --from=builder /app/public ./public
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static

USER nextjs

EXPOSE 3000

ENV PORT=3000

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