Dockerfile

# Use the official Node.js runtime as the base image
FROM node:20-alpine AS base

# Install dependencies only when needed
FROM base AS deps
RUN apk add --no-cache libc6-compat
WORKDIR /app

# Copy package files
COPY my-app/package.json my-app/package-lock.json* ./
RUN npm ci

# Rebuild the source code only when needed
FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY my-app/ ./

# Build the application
RUN npm run build

# Production image, copy all the files and run next
FROM base AS runner
WORKDIR /app

ENV NODE_ENV=production

RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

# Copy package.json and package-lock.json
COPY my-app/package.json my-app/package-lock.json ./

# Copy node_modules from deps stage
COPY --from=deps /app/node_modules ./node_modules

# Copy the built application
COPY --from=builder /app/.next ./.next
COPY --from=builder /app/public ./public

EXPOSE 80

ENV PORT=80
ENV HOSTNAME="0.0.0.0"

CMD ["npm", "start"]