NPM build in container not working

When running an NPM build in a container using Declarative pipeline, the NPM client has to be installed on the docker host (even though if it's in the container).

The provided jenkinsfile shows that the "npm --version" can be invoked in a shell task, however the Artifactory plugin seems to look for npm on the docker host not the container.

To reproduce :

• Linux box with docker and npm
• jenkins installed on the VM (not in a container)
• run the jenkinsfile (attachment)
• "break" the npm command (for instance, remove the symbolik link '/bin/npm')

Even if if use the NODEJS_HOME environment variable, the build breaks

npm_install_ko.txtnpm_jenkinsfile