Rename group package and defaults to halls

skald-install.md

@@ -56,17 +56,17 @@ The following instructions assume that your server is called
 `skald.example.org` and that you have already created a dedicated user
 called `skald`.
 
-First, make sure that the `groups` and `data` directories exist:
+First, make sure that the `halls` and `data` directories exist:
 
 ```sh
-mkdir groups data
+mkdir halls data
 ```
 
 Now copy the `skald` binary, and the directories `static`, `data` and
-`groups` to the server:
+`halls` to the server:
 
 ```sh
-rsync -a skald static data groups skald@skald.example.org:
+rsync -a skald static data halls skald@skald.example.org:
 ```
 
 If you don't have a TLS certificate, Skald will generate a self-signed