build with tag docker

Dockerfile

@@ -1,24 +1,56 @@
-FROM node:20-alpine
+# ============================================================
+# 🏗️  Stage 1 — Builder
+# ============================================================
+FROM node:20-alpine AS builder
 
+# Install hanya yang diperlukan untuk build
 RUN apk add --no-cache git bash build-base curl
 
 WORKDIR /app
 
+# Copy dependency list terlebih dahulu agar cache efektif
 COPY package*.json ./
-RUN npm ci
 
+# Gunakan npm ci (lebih cepat, konsisten)
+RUN npm ci --omit=dev
+
+# Copy source code terakhir
 COPY . .
 
-# Buat config agar Next tahu output: export
+# Buat config agar Next tahu mode static export
 RUN echo "const config = { output: 'export', images: { unoptimized: true } }; export default config;" > next.config.mjs
 
-# Build project (Next.js 15 otomatis static export)
-RUN NEXT_DISABLE_TURBOPACK=1 npx next build
+# Build Next.js tanpa Turbopack, lalu hapus cache npm
+ENV NEXT_DISABLE_TURBOPACK=1
+RUN npx next build && npm cache clean --force
 
-# Pastikan folder static tersedia untuk URL _next/static
+# Tambahkan cache folder _next agar bisa dilayani oleh server
 RUN mkdir -p .next/server/app/_next && \
     cp -r .next/static .next/server/app/_next/static && \
-    cp -r public/assets .next/server/app/
+    cp -r public/assets .next/server/app/ || true
+
+# ============================================================
+# 🧱  Stage 2 — Runtime (super ringan)
+# ============================================================
+FROM node:20-alpine AS runtime
+
+# Install hanya 1 dependency ringan untuk serving static file
+RUN npm install -g serve && apk add --no-cache tini
+
+WORKDIR /app
+
+# Copy hasil build dari stage sebelumnya
+COPY --from=builder /app/.next/server/app ./server
+COPY --from=builder /app/.next/server/app/_next ./server/_next
+COPY --from=builder /app/public ./public
+
+# Set environment minimal
+ENV NODE_ENV=production
+ENV PORT=3000
 
 EXPOSE 3000
-CMD ["npx", "serve", ".next/server/app", "-l", "3000"]
+
+# Jalankan lewat tini untuk handle signal & memory leak
+ENTRYPOINT ["/sbin/tini", "--"]
+
+CMD ["serve", "-s", "server", "-l", "3000"]