所以我构建这个 Dockerfile 来部署我的 nextjs 应用程序。现在这个 dockerfile 应该构建一个生产 nextjs 应用程序。但我的 docker 镜像相当大，有 2.3gb。这是我的 Dockerfile。
FROM node:18
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY public ./public
COPY app ./app
COPY components ./components
COPY ./lib /app/lib
COPY next.config.js ./
COPY pnpm-lock.yaml ./
COPY tailwind.config.ts ./
COPY tsconfig.json ./
COPY middleware.ts ./
COPY next-env.d.ts ./
COPY components.json ./
COPY auth.config.ts ./
COPY auth.ts ./
COPY postcss.config.js ./
RUN npm run build
RUN npm prune --production
EXPOSE 3000
CMD ["npx", "next", "start", "-H", "0.0.0.0", "-p", "3000"]
我也知道我可以切换到高山图像，但我不认为这会大大减小图像尺寸。预先感谢
0 ADD file:b7c55dda8ded4219a7cdc9fbd91dfb5996c4886d4394b85751c2f956defe3287 in / 138.89 MB
1 CMD ["bash"] 0 B
2 set -eux; apt-get update; apt-get install -y --no-install-recommends ca-certificates curl gnupg netbase sq wget ; rm -rf /var/lib/apt/lists/* 48.48 MB
3 set -eux; apt-get update; apt-get install -y --no-install-recommends git mercurial openssh-client subversion procps ; rm -rf /var/lib/apt/lists/* 182.66 MB
4 set -ex; apt-get update; apt-get install -y --no-install-recommends autoconf automake bzip2 default-libmysqlclient-dev dpkg-dev file g++ gcc imagemagick libbz2-dev libc6-dev libcurl4-openssl-dev libdb-dev libevent-dev libffi-dev libgdbm-dev libglib2.0-dev libgmp-dev libjpeg-dev libkrb5-dev liblzma-dev libmagickcore-dev libmagickwand-dev libmaxminddb-dev libncurses5-dev libncursesw5-dev libpng-dev libpq-dev libreadline-dev libsqlite3-dev libssl-dev libtool libwebp-dev libxml2-dev libxslt-dev libyaml-dev make patch unzip xz-utils zlib1g-dev ; rm -rf /var/lib/apt/lists/* 559.9 MB
5 groupadd --gid 1000 node && useradd --uid 1000 --gid node --shell /bin/bash --create-home node 8.94 KB
6 ENV NODE_VERSION=18.20.3 0 B
7 ARCH= && dpkgArch="$(dpkg --print-architecture)" && case "${dpkgArch##*-}" in amd64) ARCH='x64';; ppc64el) ARCH='ppc64le';; s390x) ARCH='s390x';; arm64) ARCH='arm64';; armhf) ARCH='armv7l';; i386) ARCH='x86';; *) echo "unsupported architecture"; exit 1 ;; esac && export GNUPGHOME="$(mktemp -d)" && set -ex && for key in 4ED778F539E3634C779C87C6D7062848A1AB005C 141F07595B7B3FFE74309A937405533BE57C7D57 74F12602B6F1C4E913FAA37AD3A89613643B6201 DD792F5973C6DE52C432CBDAC77ABFA00DDBF2B7 61FC681DFB92A079F1685E77973F295594EC4689 8FCCA13FEF1D0C2E91008E09770F7A9A5AE15600 C4F0DFFF4E8C1A8236409D08E73BC641CC11F4C8 890C08DB8579162FEE0DF9DB8BEAB4DFCF555EF4 C82FA3AE1CBEDC6BE46B9360C43CEC45C17AB93C 108F52B48DB57BB0CC439B2997B01419BD92F80A A363A499291CBBC940DD62E41F10027AF002F8B0 CC68F5A3106FF448322E48ED27F5E38D5B0A215F ; do gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys "$key" || gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$key" ; done && curl -fsSLO --compressed "https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-linux-$ARCH.tar.xz" && curl -fsSLO --compressed "https://nodejs.org/dist/v$NODE_VERSION/SHASUMS256.txt.asc" && gpg --batch --decrypt --output SHASUMS256.txt SHASUMS256.txt.asc && gpgconf --kill all && rm -rf "$GNUPGHOME" && grep " node-v$NODE_VERSION-linux-$ARCH.tar.xz\$" SHASUMS256.txt | sha256sum -c - && tar -xJf "node-v$NODE_VERSION-linux-$ARCH.tar.xz" -C /usr/local --strip-components=1 --no-same-owner && rm "node-v$NODE_VERSION-linux-$ARCH.tar.xz" SHASUMS256.txt.asc SHASUMS256.txt && ln -s /usr/local/bin/node /usr/local/bin/nodejs && node --version && npm --version 154 MB
8 ENV YARN_VERSION=1.22.19 0 B
9 set -ex && export GNUPGHOME="$(mktemp -d)" && for key in 6A010C5166006599AA17F08146C2130DFD2497F5 ; do gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys "$key" || gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$key" ; done && curl -fsSLO --compressed "https://yarnpkg.com/downloads/$YARN_VERSION/yarn-v$YARN_VERSION.tar.gz" && curl -fsSLO --compressed "https://yarnpkg.com/downloads/$YARN_VERSION/yarn-v$YARN_VERSION.tar.gz.asc" && gpg --batch --verify yarn-v$YARN_VERSION.tar.gz.asc yarn-v$YARN_VERSION.tar.gz && gpgconf --kill all && rm -rf "$GNUPGHOME" && mkdir -p /opt && tar -xzf yarn-v$YARN_VERSION.tar.gz -C /opt/ && ln -s /opt/yarn-v$YARN_VERSION/bin/yarn /usr/local/bin/yarn && ln -s /opt/yarn-v$YARN_VERSION/bin/yarnpkg /usr/local/bin/yarnpkg && rm yarn-v$YARN_VERSION.tar.gz.asc yarn-v$YARN_VERSION.tar.gz && yarn --version && rm -rf /tmp/* 5.33 MB
10 COPY file:4d192565a7220e135cab6c77fbc1c73211b69f3d9fb37e62857b2c6eb9363d51 in /usr/local/bin/ 388 B
11 ENTRYPOINT ["docker-entrypoint.sh"] 0 B
12 CMD ["node"] 0 B
13 WORKDIR /app 0 B
14 COPY package*.json ./ # buildkit 350.22 KB
15 RUN /bin/sh -c npm install # buildkit 713.24 MB
16 COPY public ./public # buildkit 29.51 KB
17 COPY app ./app # buildkit 884.7 KB
18 COPY components ./components # buildkit 150.32 KB
19 COPY ./lib /app/lib # buildkit 19.07 KB
20 COPY next.config.js ./ # buildkit 360 B
21 COPY pnpm-lock.yaml ./ # buildkit 221.58 KB
22 COPY tailwind.config.ts ./ # buildkit 2.27 KB
23 COPY tsconfig.json ./ # buildkit 709 B
24 COPY middleware.ts ./ # buildkit 208 B
25 COPY next-env.d.ts ./ # buildkit 201 B
26 COPY components.json ./ # buildkit 342 B
27 COPY auth.config.ts ./ # buildkit 997 B
28 COPY auth.ts ./ # buildkit 1.26 KB
29 COPY postcss.config.js ./ # buildkit 82 B
30 RUN /bin/sh -c npm run build # buildkit 425.76 MB
31 RUN /bin/sh -c npm prune --production # buildkit 574.88 KB
32 EXPOSE map[3000/tcp:{}] 0 B
33 CMD ["npx", "next", "start", "-H", "0.0.0.0", "-p", "3000"] 0 B
这是图层。它不是我的 nextjs 应用程序，我只是在部署，但每当我在 dockerfile 中执行 npm install --product 时，我都会因缺少软件包而出现错误。假设一些（很多）必要的包位于开发依赖项中。
通过使用 Alpine 构建并使用多阶段 dockerfile，我已经能够将图像大小减少一半。
# Stage 1: Build Stage
FROM node:18-alpine AS build
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY public ./public
COPY app ./app
COPY components ./components
COPY lib ./lib
COPY next.config.js ./next.config.js
COPY pnpm-lock.yaml ./pnpm-lock.yaml
COPY tailwind.config.ts ./tailwind.config.ts
COPY tsconfig.json ./tsconfig.json
COPY middleware.ts ./middleware.ts
COPY next-env.d.ts ./next-env.d.ts
COPY components.json ./components.json
COPY auth.config.ts ./auth.config.ts
COPY auth.ts ./auth.ts
COPY postcss.config.js ./postcss.config.js
RUN npm run build
# Stage 2: Final Stage
FROM node:18-alpine
WORKDIR /app
COPY --from=build /app /app
RUN npm prune --production
EXPOSE 3000
CMD ["npx", "next", "start", "-H", "0.0.0.0", "-p", "3000"]