External javascript file for Apache Nifi

[#1]

Hi,

We have setup Apache Nifi on kubernetes using helm charts. We also need moment.js script file 

as we are using this script file in javascript code inside executescript processor for formatting datetime format and comparing the dates. We would like to keep a copy of this file in our pod so as to not pull the file online everytime.

Could you please suggest the best way to add the script file (moment.js) via helm install deployment.