fix(admin): read int values from YAML for port fields

src/core/admin/ui.go

@@ -1,6 +1,7 @@
 package admin
 
 import (
+	"fmt"
 	"net/http"
 	"os"
 
@@ -132,8 +133,15 @@ func getNested(m map[string]interface{}, keys ...string) string {
 		}
 		v = mp[k]
 		if i == len(keys)-1 {
-			s, _ := v.(string)
-			return s
+			switch val := v.(type) {
+			case string:
+				return val
+			case int:
+				return fmt.Sprintf("%d", val)
+			case float64:
+				return fmt.Sprintf("%.0f", val)
+			}
+			return ""
 		}
 	}
 	return ""