Improve deployment docs tutorials to get to production ready setup

[surchs]

Context

We have pretty good docs on how to get started with deployment but there is always a balancing act between making the getting started section very quick and simple, and giving users all the relevant information so they can make good decisions for their production deployments. This has now come up twice (most recently in neurobagel/documentation#261) so it would be good to review this section

Why

• Have the best deployment onboarding docs we can
• Make sure both interested and convinced users have a good deployment experience
• Help users set up robust production deployments of their nodes
• Figure out how users consume our docs to inform decisions (measure / ask and listen)

Outcomes

• We have a couple of past and prospective deployment users we ask about their initial setup experience with our docs
• We have a plan for how to continue learning / monitoring how people user our docs and what they find easy or hard (e.g. survey?)
• We have written down our view as a team on what the goal of the starting docs are (e.g. including some principles)
• We have a decision on what updates/refactors we want to make to the getting started docs

What

• [ ]