对字符串domain尝试转换为json (#79)

Co-authored-by: liulei <liulei01@zving.com>

mail-worker/src/service/setting-service.js

@@ -24,8 +24,12 @@ const settingService = {
 		const setting = await c.env.kv.get(KvConst.SETTING, { type: 'json' });
 		let domainList = c.env.domain;
 		if (typeof domainList === 'string') {
+			try {
+				domainList = JSON.parse(domainList)
+			} catch (error) {
 				throw new BizError(t('notJsonDomain'));
 			}
+		}
 		domainList = domainList.map(item => '@' + item);
 		setting.domainList = domainList;
 		return setting;