DYI: Start complete subsection for docs

Anything that is too complex, are the UI is hard to get right, should
link to this section, so we can properly document.

This starting page keeps and extends some wording that was removed from
DYI a couple of days ago.

Fixes: https://gitlab.science.ru.nl/cncz/userdb-cli/-/issues/1004



Signed-off-by: Miek Gieben <miek.gieben@ru.nl>

content/howto/diy/diy.en.md

+---
+author: miek
+date: '2025-03-10T12:12:45Z'
+keywords: [ dyi ]
+lang: en
+title: DIY
+tags:
+- dyi
+- docs
+#cover:
+#  image: diy.jpg
+---
+
+The [DIY](https://diy.science.ru.nl) server that C&CZ maintains allows people to control certain
+properties of their science account and change/view their used services.
+
+The pages here contain extra documentation for certain features. We strive to keep DIY intuitive and
+lean. Some things might require more explanation, instead of trying to fit this into the DIY website
+we explain those here.
+
+## SSH Public Keys {#pubkey}
+
+Ever since [CPK 1383](https://cncz.science.ru.nl/nl/cpk/1383/), SSH key usage needs "go through us",
+to prevent phisher to update those keys as well. Currently two uses for these keys are defined:
+
+* `login`: this key allows you to login via SSH.
+* `superchown`: this key allows usage of [superchown](https://cncz.science.ru.nl/en/news/2024-04-09_superchown/).

content/howto/diy/diy.nl.md

+diy.en.md
\ No newline at end of file