services: qualify container names
Podman on Bullseye enforces qualified names (or adding aliases)
Error: error inspecting object: unable to find a name and tag match
for openzipkin/zipkin-slim in repotags: no such image
Error: error getting default registries to try: short-name
"openzipkin/zipkin-slim" did not resolve to an alias and no
unqualified-search registries are defined in
"/etc/containers/registries.conf"