Page suggestion: User interface

[brucellino]

Short Description of the issue

There are no user-facing documentation pages for the user interface.
I would have expected there to be a guide and reference documentation for the User Interface.

Instead, it is hidden in the HTC tutorial.

Summary of proposed changes

I suggest adding some pages for the user interface, and guides for provisioning it in various environments. We need a bit more background information and detail on what is actually done.

There are a few methods described -- Ansible role, Terraform OS, etc. These should be a bit more formalised, with clear paths for users to walk, based on their context, and clear outcomes.

I see these as how-to-guides.

We also have no (reference information. We should have a page for that.