Add site creation options to new Dashboard

[curtismchale]

Add New Site creation options to the new dashboard.

• autogenerate the domain, database...based on the information entered at the beginning
  • allow overrides
• would it be better to choose from dropdown for which template we clone?

[kevindherman]

@curtismchale @lukefretwell added at least the first step of adding a new site to the prototype: https://proudcity.github.io/prototypes/sites/

The next step once you select add new site, I think is what you're starting the conversation on here.

Just connecting the dots before I forget.