Add more system requirements

README.md

@@ -3,10 +3,17 @@ Built-in CODE Server app
 
 Created by Collabora Productivity Ltd.
 
+The included CODE Server app is provided as an AppImage. When running under Docker/LXC the AppImage
+will be unpacked and run, else the host is required to be able to run AppImages which adds a
+requirement on FUSE.
+
 ## System requirements
 - Linux x86-64 platform
 - 2 CPU cores
 - 1 GB RAM + 100 MB RAM / user
 - 100 kbit/s network bandwidth / user
 - 350 MB space on disk
 - Nextcloud 19 with [Collabora Online app](https://apps.nextcloud.com/apps/richdocuments) 3.7.0
+- Kernel supporting the FUSE (Filesystem in Userspace) which is a requirement for AppImage
+- FUSE 2 (libfuse.so.2 - required by Collabora_Online.AppImage)
+- Fontconfig (libfontconfig.so.1 - required by Collabora_Online.AppImage)