Copy necessary files for `next build --experimental-build-mode generate` to next docker build step
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Thrianta posted this in #help-forum
ThriantaOP
I'm working in a monorepo context and am trying to shrink the size of my built nextjs app docker image.
Im making use of
Im using the standalone output option to bundle my app into one package
Everything works fine with the setup below, but I want to add another stage to my dockerfile that copies only the necessary output from the build.
If I don't run
The build process with standalone leaves trace files which I believe show all the traced files needed. I think I might be able to use these files to include the files necessary to run
Im making use of
next build --experimental-build-mode compile to stop the build process from prefetching page content. The main reason is so that my app doesnt need a db connection at build time, which makes sense from a docker point of view. The app is forced into dynamic mode initially using compile, but once next build --experimental-build-mode generate is run, the page content is fetched and the app page cahcing is back to normal. Im using the standalone output option to bundle my app into one package
Everything works fine with the setup below, but I want to add another stage to my dockerfile that copies only the necessary output from the build.
If I don't run
generate, I can do this by copying the .next/standalone folder to another image and running node packages/apps/web/server.js (from withing the .next/standalone folder that I copied). But if I want to run generate, then I need certain files -- mainly the traced files from node_modules, which used to live 3 or 4 directories up, at the root of the monorepo.The build process with standalone leaves trace files which I believe show all the traced files needed. I think I might be able to use these files to include the files necessary to run
generate, but am not sure and would like some guidance before I do. Any ideas are appreciated. 🙂1 Reply
ThriantaOP
# Dockerfile
FROM node:20-slim AS base
RUN npm i -g corepack@latest
RUN corepack enable
RUN corepack prepare pnpm@latest --activate
WORKDIR /app
COPY . .
RUN pnpm i --frozen-lockfile
RUN cd packages/apps/web && \
rm -rf .next/ && next build --experimental-build-mode compile && \
cp -r public .next/standalone/packages/apps/web && \
cp -r .next/static .next/standalone/packages/apps/web/.next
WORKDIR /app/packages/apps/web
EXPOSE 3000
CMD ["sh", "entry-point.sh"]# entry-point.sh
#!/bin/bash
set -e
export HOSTNAME=0.0.0.0
cd "$(dirname "$0")"
npm run next build --experimental-build-mode generate
node .next/standalone/packages/apps/web/server.jsPictures of trace files, take note of their names.