Next.js。 docker 图片所需的文件

Question

我正在使用 Docker 创建一个 Next.js 项目，但每次我运行 docker build，docker 图像都是 300 MB+。我的目标是减小 docker 图像的大小。为此，我开始使用 zeit/pkg，但它无法正常工作。

问题：

docker build Next.js 中需要哪些文件？（我在每个教程中看到 COPY . .）
我怎样才能减小 docker 图片的大小？

我遵循了这个教程：https://medium.com/@evenchange4/deploy-a-commercial-next-js-application-with-pkg-and-docker-5c73d4af2ee

Docker文件:

FROM node:lts-alpine as build-env
WORKDIR /app

COPY . .

RUN yarn install --pure-lockfile --ignore-engines
ENV NODE_ENV=production
RUN yarn run build
RUN yarn run pkg

FROM node:alpine

RUN apk update && \
  apk add --no-cache libstdc++ libgcc ca-certificates && \
  rm -rf /var/cache/apk/*

WORKDIR /app

COPY --from=build-env /app/pkg .

ENV NODE_ENV=production

EXPOSE 8080

CMD ./next-app

package.json:

{
  "name": "next-app",
  "bin": "server.js",
  "pkg": {
    "assets": [
      ".next/**/*"
    ],
    "scripts": [
      ".next/**/*.js"
    ]
  },
  "scripts": {
    "test": "jest",
    "dev": "next",
    "build": "next build",
    "start": "NODE_ENV=production node server.js",
    "pkg": "pkg . -t node13-linux-x64 -o pkg"
  },
  "dependencies": {
    "next": "^9.4.0",
    "react": "^16.13.1",
    "react-dom": "^16.13.1"
  },
  "devDependencies": {
    "pkg": "4.4.8",
    "typescript": "^3.9.2"
  }
}

Answer 1

我知道问这个问题已经超过 5 个月了，但我运行在同一问题上。

我通过在 docker 中设置多阶段构建解决了这个问题，并且只将所需的文件复制到运行生产 nextjs 应用程序。

我的 Dockerfile

# Build the app
FROM node:14-alpine as build
WORKDIR /app

COPY . .
RUN npm ci
RUN npm run build
COPY ./.next ./.next


# Run app
FROM node:14-alpine

# Only copy files required to run the app
COPY --from=build /app/.next ./
COPY --from=build /app/package.json ./
COPY --from=build /app/package-lock.json ./

EXPOSE 3000

# Required for healthcheck defined in docker-compose.yml
# If you don't have a healthcheck that uses curl, don't install it
RUN apk --no-cache add curl

# By adding --production npm's devDependencies are not installed
RUN npm ci --production
RUN ./node_modules/.bin/next telemetry disable

RUN addgroup -g 1001 -S nodejs
RUN adduser -S nextjs -u 1001

USER nextjs
CMD ["npm", "start"]

摘自我的package.json

  "dependencies": {
    "next": "^9.5.5",
    "next-compose-plugins": "^2.2.0",
    "react": "^16.12.0",
    "react-dom": "^16.12.0"
  },

Next.js。 docker 图片所需的文件

Next.js. Required files for docker image

javascript

dockerfile

docker-image

next.js

zeit-pkg