fix page size to A4
add white_paper
add missing -d to wkd build
build on bookworm
Generate GPG WKD directory

With many thanks to this blog post[0] for instructions.

[0]: https://www.postsubmeta.net/blog/2021/02/15/static-openpgp-web-key-directory-setup/

Implements: https://todo.sr.ht/~taavi/ops/10
gitignore: remove node_modules files
update copyright year
bin: remove file extension
remove empty install file
add full site url to build step
build: use hut to publish the site
reorganize a bit
Add missing reason to use deployment-prep
theme: support footnotes
add missing word
add beta cluster blog post
mention author name in the byline