fix localnameserver creation

app/dns/nameserver.go

@@ -10,11 +10,11 @@ type NameServer interface {
 	QueryIP(ctx context.Context, domain string) ([]net.IP, error)
 }
 
-type LocalNameServer struct {
+type localNameServer struct {
 	resolver net.Resolver
 }
 
-func (s *LocalNameServer) QueryIP(ctx context.Context, domain string) ([]net.IP, error) {
+func (s *localNameServer) QueryIP(ctx context.Context, domain string) ([]net.IP, error) {
 	ipAddr, err := s.resolver.LookupIPAddr(ctx, domain)
 	if err != nil {
 		return nil, err
@@ -26,8 +26,8 @@ func (s *LocalNameServer) QueryIP(ctx context.Context, domain string) ([]net.IP,
 	return ips, nil
 }
 
-func NewLocalNameServer() *LocalNameServer {
-	return &LocalNameServer{
+func NewLocalNameServer() *localNameServer {
+	return &localNameServer{
 		resolver: net.Resolver{
 			PreferGo: true,
 		},

app/dns/server.go

@@ -44,7 +44,7 @@ func New(ctx context.Context, config *Config) (*Server, error) {
 	for idx, destPB := range config.NameServers {
 		address := destPB.Address.AsAddress()
 		if address.Family().IsDomain() && address.Domain() == "localhost" {
-			server.servers[idx] = &LocalNameServer{}
+			server.servers[idx] = NewLocalNameServer()
 		} else {
 			dest := destPB.AsDestination()
 			if dest.Network == net.Network_Unknown {
@@ -56,7 +56,7 @@ func New(ctx context.Context, config *Config) (*Server, error) {
 		}
 	}
 	if len(config.NameServers) == 0 {
-		server.servers = append(server.servers, &LocalNameServer{})
+		server.servers = append(server.servers, NewLocalNameServer())
 	}
 
 	return server, nil