Issue in Hands-on Tutorial

I am trying to get a hands-on on Zowe using the Hands-on Tutorial given at I have followed the document step-by-step but at the 5th step, i.e., for building the zLUX apps, the build fails due to an npm install issue. After going through the error logs, it seems like we missing a few packages required for the build. I have set up all the pre-requisites and cloned the required code from Github.

PFB the error log:
[exec] npm ERR! errno 2
[exec] npm ERR! org.zowe.editor.webclient@2.1.0 build: webpack --config ./ --progress
[exec] npm ERR! Exit status 2
[exec] npm ERR!
[exec] npm ERR! Failed at the org.zowe.editor.webclient@2.1.0 build script.
[exec] npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
[exec] npm ERR! A complete log of this run can be found in:
[exec] npm ERR! C:\Users\neena.b\AppData\Roaming\npm-cache_logs\2019-07-17T05_51_46_261Z-debug.log
[exec] Result: 2
[echo] Result of build in D:\Git_Zowe\zlux\zlux-editor\webClient is: 2

Any pointers on this will be helpful.