change node builder to use absolute path for npm install
change node builder to use absolute path for npm install

sharifelgamal/runtimes-common,nkubala/runtimes-common,sharifelgamal/runtimes-common,sharifelgamal/runtimes-common,priyawadhwa/runtimes-common,priyawadhwa/runtimes-common,sharifelgamal/runtimes-common,nkubala/runtimes-common,nkubala/runtimes-common,priyawadhwa/runtimes-common,sharifelgamal/runtimes-common,dlorenc/runtimes-common,nkubala/runtimes-common,nkubala/runtimes-common,priyawadhwa/runtimes-common,priyawadhwa/runtimes-common,sharifelgamal/runtimes-common,priyawadhwa/runtimes-common,priyawadhwa/runtimes-common,GoogleCloudPlatform/runtimes-common,sharifelgamal/runtimes-common,GoogleCloudPlatform/runtimes-common,GoogleCloudPlatform/runtimes-common,dlorenc/runtimes-common,dlorenc/runtimes-common