For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Meowcat285:branches:server:http/openSUSE_Tumbleweed/home:Meowcat285:branches:server:http.repo
zypper refresh
zypper install caddy
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Meowcat285:branches:server:http/16.0/home:Meowcat285:branches:server:http.repo
zypper refresh
zypper install caddy
For 15.7 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Meowcat285:branches:server:http/15.7/home:Meowcat285:branches:server:http.repo
zypper refresh
zypper install caddy
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Meowcat285:branches:server:http/15.6/home:Meowcat285:branches:server:http.repo
zypper refresh
zypper install caddy