package.jsonsince this can specify the entry point if it's not
index.jswhich is the default.
To include the dependencies, you should set up your project as usual and run
node_modules folder, plus
package.json if you need it - and deploy those as your action. Here's a script I use to do this in one of my own projects (the Project Codename generator I built as an Alexa skill):
zip -r project-codename.zip index.js node_modules wsk action update --kind nodejs:6 alexa/project-codename project-codename.zip
The first line creates the zip file and the second one uses it to update (or create if it doesn't exist) my action. It's a simple workflow but like so many things - easy when you know how. I had to ask for someone else's example and hopefully by sharing this, I've enabled someone else and so we keep on building more awesome :)