When trying to run a patch-package during a Docker build on CI (Gitlab) it fails with the following error.

npm WARN lifecycle <packagename>~postinstall: cannot run in wd <packagename> patch-package (wd=/app)

In order to fix this you need to add a .npmrc file with the following declaration making sure to copy the file to your Dockerfile.

unsafe-perm = true

The above information should be added to the README.md file for other users