add

trading_assistant_api/common/logger/logger.go

@@ -72,7 +72,14 @@ func SetupTimezone(tz string) error {
 	}
 	loc, err := time.LoadLocation(tz)
 	if err != nil {
-		return err
+		// fallback for alpine without tzdata
+		switch tz {
+		case "Asia/Shanghai", "PRC", "CST":
+			time.Local = time.FixedZone("CST", 8*3600)
+			return nil
+		default:
+			return err
+		}
 	}
 	time.Local = loc
 	return nil