Take this advice with a grain of salt cause I'm not an expert. You can save the contents of the yarn cache directory between builds. Set it with the YARN_CACHE

Take this advice with a grain of salt cause I'm not an expert. You can save the contents of the yarn cache directory between builds. Set it with the YARN_CACHE_FOLDER environment variable. Build an intermediate docker image with all packages built. Later images can be based from that and don't need to rebuild.