Dockerfile

# ===========================
# Stage 1: Dependencies
# ===========================
FROM node:22-alpine AS deps

# Install libc6-compat for compatibility
RUN apk add --no-cache libc6-compat

# Enable Corepack for pnpm
RUN corepack enable && corepack prepare pnpm@latest --activate

WORKDIR /app

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

# Install dependencies
RUN pnpm install --frozen-lockfile

# ===========================
# Stage 2: Builder
# ===========================
FROM node:22-alpine AS builder

# Enable Corepack for pnpm
RUN corepack enable && corepack prepare pnpm@latest --activate

WORKDIR /app

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

# Copy application source
COPY . .

# Build Next.js application
# This creates .next/standalone directory
ENV NEXT_TELEMETRY_DISABLED=1
RUN pnpm build

# ===========================
# Stage 3: Runner
# ===========================
FROM node:22-alpine AS runner

WORKDIR /app

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

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

# Copy built application from builder
COPY --from=builder /app/public ./public
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
EXPOSE 3000

ENV PORT=3000
ENV HOSTNAME="0.0.0.0"

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
  CMD node -e "require('http').get('http://localhost:3000/api/health', (res) => { process.exit(res.statusCode === 200 ? 0 : 1); })"

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