llm, add note to AGENTS about the host system and Docker container preferences.

tasks/workstation/linux/software/ai/llm.yml

@@ -574,11 +574,19 @@
               container. You are the user `user` and have been granted access to
               the designer's Code and SDKs via mount at `{{ user_user.home }}`.
 
+              Host system is typically (but not always) a systemd-free distro
+              such as Artix or Devuan. User likes the `runit` service manager.
+              `elogind` is used rather than systemd's logind. Desktop is i3 and
+              display manager is lightdm. Servers are run on Debian and Docker
+              containers are typically debian:trixie-slim with a Dockerfile
+              called by compose.yml which adds the necessary packages, sometimes
+              building from source if the Debian executable is too old.
+
               If the `$GOT_EM` environment variable is `true` then all the
               necessary packages for compiling Android and Flutter were
               installed. If it is `false` then they were not installed, and
               compiling will fail. Please check this before trying and alert me
-              if they need added. If we don;t have Internet, then ask me to
+              if they need added. If we don't have Internet, then ask me to
               compile or run whatever command is needed on the host system.
 
               # Rules