I am new to OpenWhisk. I am currently using AWS Lambda(node.js) to generate custom tokens. Lambda has an option to upload the Zip file as a package. Does OpenWhisk have a similar option? I couldn't find any doc related to such an option.
OpenWhisk now (24th October 2016) supports uploading a zip file with your Node.js source files and NPM modules to run as an Action.
This documentation page has details on how to use this feature.
$ wsk action create packageAction --kind nodejs:6 action.zip