Incorporate feedback from Pull requests

[lagerratrobe]

From Devin:

Thanks for working through all these. Good to see we're getting close.

I'm going to do another more detailed review, but a couple consistent comments:

• please use filenames https://quarto.org/docs/output-formats/html-code.html#code-filename when you have snippets that are expected to be a file
• specify the specific output language (eg not markdown)
• simplify the file blocks that are multichunk using executable block syntax https://quarto.org/docs/output-formats/html-code.html#executable-blocks
• refactor common elements across each doc to either link to a separate doc, or have a single embed (namely the server registration steps). You can use the includes shortcode https://quarto.org/docs/authoring/includes.html
• there are some inconstancies in how inputs/outputs are presented - sometimes you replace with , sometimes you copy-paste your output. (eg "you should see the following after a deploy". We want to be nitpicky around describing if it will be exactly what they see, or approximately what they see.