[DOCS] deploying custom elements

[isabelizimm]

closes #192

closes #175

[SamEdwardes]

Hey Isabel - thank you for drafting this page. I think it will be helpful! I have made a few suggestions and raised a few questions :)

[SamEdwardes]

I find the term "custom elements" a bit unclear. If I was searching for how to do this in Vetiver, I think I would search for something like:

• How to deploy custom models in Vetiver.
• How to deploy unsupported models in Vetiver.
• How to include custom code in Vetiver.
• How to deploy a Vetiver model with a custom pipeline.

Are you committed already to the term "custom elements"? I also notice we use a few different terms in this doc:

• custom element
• custom model
• custom handler

[isabelizimm]

"Custom elements" was me trying to find single word that worked for unsupported models/custom code/custom models. I'm open to suggestions if you have something else in mind! Would just calling it custom code make more sense? Even though it's sometimes not custom code, but rather an unsupported model?

If I aligned on one word (custom element or otherwise), and then used

• CustomHandler rather than "custom handler"
• "unsupported model" rather than "custom model"

would that be a better indication of what I am referring to?

[SamEdwardes]

I think this method deserves more explanation. I am confused about what it does and why I need it. Could I just use a string there?

Maybe it would help if the code included a fully executable example that shows defining the custom handler and then using it.

[isabelizimm]

Ah, that's a great point. Let me update this to include using the custom handler inside a VetiverModel object.