Multi-stage builds − This strategy involves using multiple FROM statements in a Dockerfile to create multiple images, each with a specific purpose. This strategy is simple to implement, but it has a drawback, which is that it increases the size of the image, as it will contain all the dependencies. When the image is built, the files in the node_modules directory are not copied, and the 'RUN npm install' instruction is executed again. dockerignore file and listing the node_modules directory in it. dockerignore file − This strategy involves excluding the node_modules directory from being copied into the image. There are several strategies for caching the 'RUN npm install' instruction in a Dockerfile. In this article, we will explore different strategies for caching the 'RUN npm install' instruction in a Dockerfile. Caching the results of this instruction can greatly improve the build time of your image.

This instruction installs all the dependencies listed in your package.json file. To do this, just prefix the names and write them in snake case: YARN_CACHE_FOLDER will set the cache folder (such values will overwrite any that might have been defined in the RC files - use them sparingly).When building a Docker image, one of the most time-consuming and resource-intensive steps is running the 'RUN npm install' instruction. yarnrc won't do).Įnvironment variables can be accessed from setting definitions by using the $ (which will return fallback if NAME isn't set, or is an empty string).įinally, note that most settings can also be defined through environment variables (at least for the simpler ones arrays and objects aren't supported yet). Starting from the v2, they must be written in valid Yaml and have the right extension (simply calling your file. While Yarn will automatically find them in the parent directories, they should usually be kept at the root of your project (often your repository).

yarnrc.yml) are the one place where you'll be able to configure Yarn's internal settings. Yarnrc files (named this way because they must be called.

Npm config set cache