docs: document how to contribute

GUIDE.md

@@ -33,7 +33,7 @@ Some features:
 * touch a character to see stroke order details incl numbering,
 * add your own notes and automatically get radical and listening exercises in addition to classic vocabulary cards.
 
-Among other places, the Kartenaale group meets on [Whatsapp](https://chat.whatsapp.com/JFKpfmq29yM2xKcSu7JQib)
+Among other places, the Kartenaale group meets on [Whatsapp](https://chat.whatsapp.com/JFKpfmq29yM2xKcSu7JQib).
 
 ## Quickstart Guide
 

README.md

 # Getting started with Anki
-Hi, if you are wondering how to start using Anki with kartenaale content, then
-this page is for you.
+Hi, if you are wondering how to start using Anki with _Kartenaale_ content,
+then this page is for you.
 
 If you are completely new to Anki, see the user guide in [English](GUIDE.md) or
 [German](ANLEITUNG.md).
 
-If you already know Anki and just want to download APKGs, check out the release sections in the various
-packs in [kartenaale/packs](https://gitlab.phaidra.org/kartenaale/packs), e.g. [Sinologie Anki Decks STEOP](https://gitlab.phaidra.org/kartenaale/packs/sinology-1/-/releases) for STEOP.
+If you already know Anki and just want to download APKGs, check out the release
+sections in the various packs in
+[kartenaale/packs](https://gitlab.phaidra.org/kartenaale/packs), e.g.
+[Sinologie Anki Decks STEOP](https://gitlab.phaidra.org/kartenaale/packs/sinology-1/-/releases)
+for STEOP.
+
+If you want to contribute your own Anki content, either contribute to an
+existing pack with a merge request or check out the starter project
+in
+[kartenaale/templates/anki-pack](https://gitlab.phaidra.org/kartenaale/templates/anki-pack)
+to start your own new pack.