configure npm install only if path is defined
configure npm install only if path is defined

varnish/varnish-microservice-monitor,varnish/varnish-microservice-monitor,varnish/zipnish,varnish/varnish-microservice-monitor,varnish/zipnish,varnish/varnish-microservice-monitor,varnish/zipnish,varnish/varnish-microservice-monitor,varnish/zipnish,varnish/zipnish