Added nextBuildArguments and staticPath as inputs

[jlaramie]

Describe the bug

To keep the folder structure a bit cleaner I keep the nextjs code in a subdirectory. In order to do this you configure next.config.js distDir: ../back/../to/../root/.next and you call next build path/to/pages

The Problem

• The current build function for does not allow you to add arguments to the build function.
• The current build function assumes your staticPath is the same as nextConfigDir

Solution

• Expose a new input nextBuildArguments for passing additional info into the nextjs build.
• Expose a new input staticPath which combines with nextConfigDir and allows you to override the location of the static assets.

[danielcondemarin]

@jlaramie Thank you for PR-ing. Hope you had open an issue first. I've submitted a new Feature Request which is how I want to move forward to solve issues like this: #214.

[jlaramie]

@danielcondemarin Yeah this was something I needed so I forked to get it. I appreciate you looking over this issue and coming up with another solution. Should I go ahead and close this pull request then?

[danielcondemarin]

Yes lets close it. If you have the time Im happy to take a PR for the decoupled build 🙂