Modify the action to rebuild

[bahorn]

Just had an issue where I forgot to commit my latest bundle.js. Really need to sort this into the build process.

[ksouthern]

Is it possible for us to have the npm build included in the build process?

[bahorn]

I got this working in my fork, but it does require removing the gh-pages branch and just having it automatically generated.

I guess we could use another branch for the automatic builds which would save quite a bit of hassle involved in that.