fix: de-dupe dns resolver logging, more concise [ci skip]

pkg/dns/common.go

@@ -47,8 +47,6 @@ func EnsureIPv4(domainName string) (string, error) {
 		},
 	}
 
-	logrus.Debugf("created DNS resolver via %s", freifunkDNS)
-
 	ctx := context.Background()
 	ips, err := resolver.LookupIPAddr(ctx, domainName)
 	if err != nil {
@@ -60,7 +58,7 @@ func EnsureIPv4(domainName string) (string, error) {
 	}
 
 	ipv4 = ips[0].IP.To4().String()
-	logrus.Debugf("discovered the following ipv4 addr: %s", ipv4)
+	logrus.Debugf("%s points to %s (resolver: %s)", domainName, ipv4, freifunkDNS)
 
 	return ipv4, nil
 }