Setup LXC

Go to "local" in webgui 
 
Click on "CT Templates"
Then click button "Templates"
Download Debian 13
Click "Create CT" on top richt
Give it Hostname and Password, Make sure Unpriviledged and Nesting is checked
Click next, choose the previous downloaded Template
Click next, default size 8GB is sufficient
Click next, assign 2 Cores
Click next, type 2048MiB Memory
Click next, choose IP according your network (or DHCP)
Click through finish