修改构建模式为standalone模式，极大减小docker镜像大小

Dockerfile

@@ -1,10 +1,66 @@
-FROM --platform=linux/amd64 node:18-alpine
+FROM node:18-alpine AS base
 
-COPY app /app
+# Install dependencies only when needed
+FROM base AS deps
+# Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.
+RUN apk add --no-cache libc6-compat
 WORKDIR /app
 
-RUN npm install --force
+# Install dependencies based on the preferred package manager
+COPY app/package.json app/yarn.lock* app/package-lock.json* app/pnpm-lock.yaml* ./
+RUN \
+  if [ -f yarn.lock ]; then yarn --frozen-lockfile; \
+  elif [ -f package-lock.json ]; then npm ci; \
+  elif [ -f pnpm-lock.yaml ]; then yarn global add pnpm && pnpm i --frozen-lockfile; \
+  else echo "Lockfile not found." && exit 1; \
+  fi
+
+
+# Rebuild the source code only when needed
+FROM base AS builder
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY app .
+
+# Next.js collects completely anonymous telemetry data about general usage.
+# Learn more here: https://nextjs.org/telemetry
+# Uncomment the following line in case you want to disable telemetry during the build.
+# ENV NEXT_TELEMETRY_DISABLED 1
+
+# If using npm comment out above and use below instead
 RUN npm run build
 
+# Production image, copy all the files and run next
+FROM base AS runner
+WORKDIR /app
+
+ENV NODE_ENV production
+# Uncomment the following line in case you want to disable telemetry during runtime.
+# ENV NEXT_TELEMETRY_DISABLED 1
+
+RUN addgroup --system --gid 1001 nodejs
+RUN adduser --system --uid 1001 nextjs
+
+COPY --from=builder /app/public ./public
+
+# Set the correct permission for prerender cache
+RUN mkdir .next
+RUN chown nextjs:nodejs .next
+
+# Automatically leverage output traces to reduce image size
+# https://nextjs.org/docs/advanced-features/output-file-tracing
+COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
+COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
+COPY --from=builder --chown=nextjs:nodejs /app/.next/BUILD_ID ./.next/BUILD_ID
+
+USER nextjs
+
 EXPOSE 3000
-CMD [ "npm", "run", "start" ]
+
+ENV PORT 3000
+# set hostname to localhost
+ENV HOSTNAME "0.0.0.0"
+
+# server.js is created by next build from the standalone output
+# https://nextjs.org/docs/pages/api-reference/next-config-js/output
+CMD ["node", "server.js"]

app/next.config.js

@@ -1,12 +1,13 @@
-const {i18n} = require('./next-i18next.config')
-const fs = require('fs');
+const { i18n } = require('./next-i18next.config')
+const fs = require('fs')
 
 module.exports = {
-    i18n,
-    reactStrictMode: true,
-    // Required by Next i18n with API routes, otherwise API routes 404 when fetching without trailing slash
-    trailingSlash: true,
-    generateBuildId: () => {
-        return process.env.GIT_COMMIT || 'development';
-    }
+  i18n,
+  reactStrictMode: true,
+  // Required by Next i18n with API routes, otherwise API routes 404 when fetching without trailing slash
+  trailingSlash: true,
+  generateBuildId: () => {
+    return process.env.GIT_COMMIT || 'development'
+  },
+  output: 'standalone'
 }