Dockerfile

# Multi-stage build for optimized Next.js production deployment

# Stage 1: Dependencies
FROM node:18-alpine AS deps
RUN apk add --no-cache libc6-compat
WORKDIR /app

# Copy package files
COPY package.json package-lock.json* ./

# Install dependencies
RUN npm ci --only=production

# Stage 2: Builder
FROM node:18-alpine AS builder
WORKDIR /app

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

# Build Next.js app (standalone output)
ENV NEXT_TELEMETRY_DISABLED 1
RUN npm run build

# Stage 3: Runner (production image)
FROM node:18-alpine AS runner
WORKDIR /app

ENV NODE_ENV production
ENV NEXT_TELEMETRY_DISABLED 1

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

# Copy necessary files from builder
COPY --from=builder /app/public ./public
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static
COPY --from=builder /app/config ./config

# Set correct permissions
RUN chown -R nextjs:nodejs /app

# Switch to non-root user
USER nextjs

# Expose port
EXPOSE 3000

ENV PORT 3000
ENV HOSTNAME "0.0.0.0"

# Start application
CMD ["node", "server.js"]