Dockerfile

# =============================================================================
# Dockerfile for GPK Website (Next.js)
# Uses multi-stage build for optimized production images
# =============================================================================

# -----------------------------------------------------------------------------
# Stage 1: Dependencies
# Install all dependencies needed for the build
# -----------------------------------------------------------------------------
FROM node:20-alpine AS deps

# Add libc6-compat for Alpine compatibility with some npm packages
RUN apk add --no-cache libc6-compat

WORKDIR /app

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

# Install dependencies
RUN npm ci

# -----------------------------------------------------------------------------
# Stage 2: Builder
# Build the Next.js application
# -----------------------------------------------------------------------------
FROM node:20-alpine AS builder

WORKDIR /app

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

# Copy source code
COPY . .

# Build the application
# Next.js collects anonymous telemetry - disable it during build
ENV NEXT_TELEMETRY_DISABLED=1

RUN npm run build

# -----------------------------------------------------------------------------
# Stage 3: Runner
# Minimal production image
# -----------------------------------------------------------------------------
FROM node:20-alpine AS runner

# Add libc6-compat for Alpine compatibility with native deps in the standalone bundle
RUN apk add --no-cache libc6-compat

WORKDIR /app

# Set production environment
ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1

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

# Copy public assets
COPY --from=builder /app/public ./public

# Copy the standalone build output
# The standalone output includes only the necessary files to run the app
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

# Switch to non-root user
USER nextjs

# Expose port 3000
EXPOSE 3000

# Set hostname to listen on all interfaces
ENV HOSTNAME="0.0.0.0"
ENV PORT=3000

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