Dockerfile

# deps
FROM node:20-alpine AS deps
RUN apk add --no-cache libc6-compat
WORKDIR /app

# Copy package files
COPY package*.json ./

# Install production dependencies
RUN npm ci --only=production

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

# Copy package files
COPY package*.json ./

# Install all dependencies
RUN npm ci

COPY . .

# Build the application
RUN npm run build

# runner
FROM node:20-alpine AS runner
WORKDIR /app

ENV NODE_ENV=production

# Create non-root user
RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

# Copy production node_modules from deps stage
COPY --from=deps --chown=nextjs:nodejs /app/node_modules ./node_modules

# Copy built application
COPY --from=builder --chown=nextjs:nodejs /app/public ./public
COPY --from=builder --chown=nextjs:nodejs /app/.next ./.next
COPY --from=builder --chown=nextjs:nodejs /app/package.json ./package.json

# Copy startup script
COPY --chown=nextjs:nodejs start.sh ./start.sh
RUN chmod +x ./start.sh

USER nextjs

EXPOSE 3000

ENV PORT=3000
ENV HOSTNAME="0.0.0.0"

CMD ["./start.sh"]