README 修正

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开发者您好，vercel部署的部分并未提及首次部署要进行数据库初始化，访问后数据库报错缺少表：Fatal error: Uncaught PDOException: SQLSTATE[42P01]: Undefined table: 7 ERROR: relation "sessions" does not exist LINE 1: SELECT sess_data FROM sessions WHERE sess_id = $1 AND sess_l... ^ in /var/task/user/api/includes/config.php:33 Stack trace: #0 /var/task/user/api/includes/config.php(33): PDOStatement->execute(Array) #1 [internal function]: DatabaseSessionHandler->read('977e6198ff4d84d...') #2 /var/task/user/api/includes/config.php(88): session_start() #3 /var/task/user/api/index.php(30): require_once('/var/task/user/...') #4 {main} thrown in /var/task/user/api/includes/config.php on line 33

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很抱歉 Vercel及VPS部署都应该进行运行迁移 稍后修改README