fix: Update configuration for improved clarity

internal/config/default.go

@@ -30,7 +30,7 @@ func Default() Config {
 			FlushTimeout:           2 * time.Second,
 		},
 		Metric: metric.Config{
-			Address: ":8080",
+			Server:  metric.Server{Address: ":8080"},
 			Enabled: true,
 		},
 	}

internal/metric/config.go

@@ -1,6 +1,10 @@
 package metric
 
 type Config struct {
-	Address string `json:"address,omitempty" koanf:"address"`
+	Server  Server `json:"server,omitempty" koanf:"server"`
 	Enabled bool   `json:"enabled,omitempty" koanf:"enabled"`
 }
+
+type Server struct {
+	Address string `json:"address,omitempty" koanf:"address"`
+}

internal/metric/server.go

@@ -9,30 +9,30 @@ import (
 	"go.uber.org/zap"
 )
 
-// Server contains information about metrics server.
-type Server struct {
+// MetricServer contains information about metrics server.
+type MetricServer struct {
 	srv     *http.ServeMux
 	address string
 }
 
 // NewServer creates a new monitoring server.
-func NewServer(cfg Config) Server {
+func NewServer(cfg Config) MetricServer {
 	var srv *http.ServeMux
 
 	if cfg.Enabled {
 		srv = http.NewServeMux()
 		srv.Handle("/metrics", promhttp.Handler())
 	}
 
-	return Server{
-		address: cfg.Address,
+	return MetricServer{
+		address: cfg.Server.Address,
 		srv:     srv,
 	}
 }
 
 // Start creates and run a metric server for prometheus in new go routine.
 // nolint: mnd
-func (s Server) Start(logger *zap.Logger) {
+func (s MetricServer) Start(logger *zap.Logger) {
 	go func() {
 		// nolint: exhaustruct
 		srv := http.Server{