添加 otel 相关环境变量，优化部署配置

web/globals/otel.go

@@ -3,6 +3,7 @@ package globals
 import (
 	"context"
 	"fmt"
+	"platform/pkg/env"
 
 	"go.opentelemetry.io/otel"
 	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
@@ -16,8 +17,13 @@ import (
 var tp *trace.TracerProvider
 
 func initOtel(ctx context.Context) error {
+	if env.OtelHost == "" || env.OtelPort == "" {
+		return nil
+	}
+
+	addr := env.OtelHost + ":" + env.OtelPort
 	exporter, err := otlptracegrpc.New(ctx,
-		otlptracegrpc.WithEndpoint("localhost:4317"),
+		otlptracegrpc.WithEndpoint(addr),
 		otlptracegrpc.WithInsecure(),
 	)
 	if err != nil {