Add Functions-specific configuration docs to resource controller page

[abbycross]

URL to the relevant guide or resource

No response

Select all that apply

• new content request
• typo
• code bug
• out-of-date content
• broken link
• other

Describe the fix or the content request.

Tova wrote a boxnote to incorporate into the current page here.

For new content requests - if the request is accepted, do you want to write the content?

(No answer)