change order of sections to have the most general first

[Marcus Kreusch (mkreusch)]

Summary

Currently, the order of the sections seems to be a little off, starting with a quite special topic like manipulating headers before even discussing how to set up custom endpoints in the first place. This change is for fixing that.

Related links

Checklist

• [ ] I reviewed affected links, code samples, and cross-references, including PageRef references where relevant.
• [ ] I added or updated redirects in .gitbook.yaml if pages were moved, renamed, or deleted.
• [ ] I updated .wordlist.txt (and sorted it) if spellcheck flags new legitimate terms.
• [ ] Any required dependent changes in downstream modules have already been merged and published.
• [ ] This pull request is ready for review.

Notes