Fix: logger shows empty error msg

internal/logger/logger.go

@@ -55,6 +55,14 @@ func New(level, output string) *Logger {
 }
 
 func (l *Logger) Fatal(msg string, fields ...interface{}) {
-	l.Logger.Fatal(msg, zap.Any("fields", fields))
+    zapFields := make([]zap.Field, 0, len(fields))
+    for _, f := range fields {
+        switch v := f.(type) {
+        case error:
+            zapFields = append(zapFields, zap.Error(v))
+        default:
+            zapFields = append(zapFields, zap.Any("field", v))
+        }
+    }
+    l.Logger.Fatal(msg, zapFields...)
 }
-