Dockerfile

# Stage 1: Dependencies - Install all dependencies
FROM node:20-alpine AS deps
WORKDIR /app

# Copy package files
COPY package*.json ./
RUN npm ci

# Stage 2: Builder - Build the 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
RUN npm run build

# Stage 3: Runner - Production server
FROM node:20-alpine AS runner
WORKDIR /app

ENV NODE_ENV production

# Create non-root user for security
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 --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 the port Next.js will run on
EXPOSE 3000

ENV PORT 3000

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