all: ensure ctrld started after mongodb on Ubios

Because ctrld needs to query custom client mapping from it.

While at it, also make the error message clearer when initializing ubios
discover failed, by attaching the command output to returned error.

cmd/cli/prog_linux.go

@@ -13,6 +13,7 @@ import (
 	"tailscale.com/health"
 
 	"github.com/Control-D-Inc/ctrld/internal/dns"
+	"github.com/Control-D-Inc/ctrld/internal/router"
 )
 
 func init() {
@@ -39,6 +40,9 @@ func setDependencies(svc *service.Config) {
 			svc.Dependencies = append(svc.Dependencies, "Wants=systemd-networkd-wait-online.service")
 		}
 	}
+	if routerDeps := router.ServiceDependencies(); len(routerDeps) > 0 {
+		svc.Dependencies = append(svc.Dependencies, routerDeps...)
+	}
 }
 
 func setWorkingDirectory(svc *service.Config, dir string) {