refactor: simplify Dockerfile for Next.js 14 and optimize build stages

dockerfile

@@ -1,88 +1,48 @@
-# =============================================================================
-# Multi-stage Dockerfile for Next.js 15 - Production Optimized
-# =============================================================================
-# Stage 1: Dependencies - Install all dependencies
-# Stage 2: Builder - Build the application
-# Stage 3: Runner - Production runtime
-# =============================================================================
+# Dockerfile for Next.js 14 - Optimized for Production
 
-# -----------------------------------------------------------------------------
-# Stage 1: Dependencies
-# -----------------------------------------------------------------------------
-FROM node:22-alpine AS deps
-
-# Install system dependencies for node-gyp
-RUN apk add --no-cache libc6-compat
+# Use the official Node.js image with Alpine Linux for a smaller footprint
+FROM node:22-alpine AS base
 
+# Set the working directory in the container
 WORKDIR /app
 
-# Copy dependency files
-COPY package.json package-lock.json* ./
+# Copy package.json and package-lock.json (or yarn.lock)
+COPY package*.json ./
 
-# Install dependencies
-# Use npm ci for reproducible builds
-RUN npm ci --legacy-peer-deps || npm install --legacy-peer-deps
+# Install dependencies - leveraging Docker cache
+RUN npm i --force 
 
-# -----------------------------------------------------------------------------
-# Stage 2: Builder
-# -----------------------------------------------------------------------------
-FROM node:22-alpine AS builder
-
-WORKDIR /app
-
-# Copy dependencies from deps stage
-COPY --from=deps /app/node_modules ./node_modules
-
-# Copy source code
+# Copy the rest of the application code
 COPY . .
 
-# Set build-time environment variables
-ENV NEXT_TELEMETRY_DISABLED=1
-ENV NODE_ENV=production
-
-# Build application
+# Build the Next.js application
 RUN npm run build
 
-# -----------------------------------------------------------------------------
-# Stage 3: Runner (Production)
-# -----------------------------------------------------------------------------
+# Stage 2: Production image - smaller and leaner
 FROM node:22-alpine AS runner
 
-# Install runtime dependencies
-RUN apk add --no-cache \
-    libc6-compat \
-    dumb-init
-
+# Set the working directory
 WORKDIR /app
 
-# Set production environment
-ENV NODE_ENV=production
-ENV NEXT_TELEMETRY_DISABLED=1
-ENV PORT=3000
-ENV HOSTNAME="0.0.0.0"
+# Set environment variables
+ENV NODE_ENV $NODE_ENV
+ENV NEXT_TELEMETRY_DISABLED 1 
 
-# Create non-root user for security
-RUN addgroup --system --gid 1001 nodejs && \
-    adduser --system --uid 1001 nextjs
+# Add a non-root user for security
+RUN addgroup -g 1001 -S nodejs
+RUN adduser -S nextjs -u 1001
 
-# Copy necessary files from builder (standalone mode)
-COPY --from=builder --chown=nextjs:nodejs /app/next.config.js ./
-COPY --from=builder --chown=nextjs:nodejs /app/public ./public
-COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
-COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
+# Copy only the necessary files from the builder stage
+COPY --from=base /app/next.config.js ./
+COPY --from=base /app/public ./public
+COPY --from=base --chown=nextjs:nodejs /app/.next/standalone ./
+COPY --from=base --chown=nextjs:nodejs /app/.next/static ./.next/static
 
-# Switch to non-root user
+# Change ownership of all copied files to the non-root user
 USER nextjs
 
-# Expose port
+# Expose the port Next.js listens on
 EXPOSE 3000
 
-# Health check
-HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
-    CMD node -e "require('http').get('http://localhost:3000/', (res) => { process.exit(res.statusCode === 200 ? 0 : 1); }).on('error', () => { process.exit(1); });"
-
-# Use dumb-init to handle signals properly
-ENTRYPOINT ["dumb-init", "--"]
-
-# Start Next.js in standalone mode
+# Command to start the Next.js server in production mode
 CMD ["node", "server.js"]