You can write your
support-request, help offering and suggestions to firstname.lastname@example.org.
You can join the HoldingNuts IRC channel on irc://irc.freenode.net/#holdingnuts.
As I'm / we're living in Germany we (probably) need something called legal notice (Impressum). As long as you're not a lawyer whose hobby is to write cease-and-desist warnings to private individuals, you can skip this entire page.