Multi-stage builds is a feature that was added in Docker v17.05. It allows you to use multiple FROM instructions to define multiple images as stages inside a single Dockerfile.
You can extract artifacts from the previous stage and add them to the next stage in a single instruction (and thus a single layer).
In our case, we can define two stages – one for building our application, and the second one that just copies the dist and node_modules directory and specifies the CMD instruction:
FROM node:8-alpine as builderUSER nodeWORKDIR /home/nodeCOPY --chown=node:node . .RUN ["yarn"]COPY --chown=node:node . .RUN ["yarn", "run", "build"]RUN find . ! -name dist ! -name node_modules -maxdepth 1 -mindepth 1 -exec rm -rf {} \;FROM ...
