For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ojkastl_buildservice:docker_compose_etc/openSUSE_Tumbleweed/home:ojkastl_buildservice:docker_compose_etc.repo
zypper refresh
zypper install docker-compose
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ojkastl_buildservice:docker_compose_etc/15.5/home:ojkastl_buildservice:docker_compose_etc.repo
zypper refresh
zypper install docker-compose
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ojkastl_buildservice:docker_compose_etc/15.4/home:ojkastl_buildservice:docker_compose_etc.repo
zypper refresh
zypper install docker-compose
For 15.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ojkastl_buildservice:docker_compose_etc/15.3/home:ojkastl_buildservice:docker_compose_etc.repo
zypper refresh
zypper install docker-compose