Dockerfile

# Multi-stage build for optimized production 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 package.json pnpm-lock.yaml ./
# Install pnpm
RUN npm install -g pnpm@10.7.1
# Install dependencies
RUN pnpm install --frozen-lockfile

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

# Set environment variables for web deployment
ENV DEPLOYMENT_TARGET=web
ENV NEXT_TELEMETRY_DISABLED=1

# Install pnpm in builder stage
RUN npm install -g pnpm@10.7.1

# Build the application using web-specific config
RUN cp next.config.web.ts next.config.ts
RUN pnpm run next:build

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

ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1
ENV DEPLOYMENT_TARGET=web

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

# Note: public directory not needed for standalone Next.js builds
# Static files are handled by the standalone server

# Set the correct permission for prerender cache
RUN mkdir .next
RUN chown nextjs:nodejs .next

# Automatically leverage output traces to reduce image size
# https://nextjs.org/docs/advanced-features/output-file-tracing
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

USER nextjs

# Expose port
EXPOSE 3000

ENV PORT=3000
ENV HOSTNAME="0.0.0.0"

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