add note for nextcloud as alternative to caldav, nextcloud android sync and current state of server setups

docs/calDAV.md

@@ -3,6 +3,8 @@
 ### Goal
 
 - Set up a own caldav server which allows to sync [calcurse](https://www.calcurse.org/) with your other devices.
+If you want to run nextcloud anyways, you can also use its caldav server.
+This is a more light weight solution, which does not require a full php environment.
 
 ### Software used
 

docs/nextcloud.md

@@ -197,3 +197,7 @@ Like with `khard` you can now add this to your cronjob to sync your calendar reg
 See my [syncclouds.sh script as an example](https://bocken.org/git/Alexander/dotfiles/src/branch/master/.local/bin/syncclouds.sh) which also handles corrupted lockfiles because of unexpected aborts.
 
 TODO: investigate wheter todos are possible to also be synced. Could not get it working myself.
+
+### Sync to Android
+
+If you wish to sync your calendar to your Android phone, you can use the [DAVx⁵](https://www.davx5.com/) app. Contacts are also possible