도커에 ci4를 올려서 사용하려고 합니다..

ci3을 쓰다가 4를 써보려고 하는데 db연결 자체가 계속 오류가 나네요;;ㅠㅠ

로그를 보면 연결 자체가 안된다는것 같긴합니다..

CRITICAL - 2020-06-30 17:43:11 --> No such file or directory
#0 /application/system/Database/BaseConnection.php(377): CodeIgniter\Database\MySQLi\Connection->connect(false)
#1 /application/system/Database/BaseConnection.php(643): CodeIgniter\Database\BaseConnection->initialize()
#2 /application/app/Controllers/News.php(14): CodeIgniter\Database\BaseConnection->query('SELECT * FROM n...')
#3 /application/system/CodeIgniter.php(914): App\Controllers\News->index()
#4 /application/system/CodeIgniter.php(400): CodeIgniter\CodeIgniter->runController(Object(App\Controllers\News))
#5 /application/system/CodeIgniter.php(308): CodeIgniter\CodeIgniter->handleRequest(NULL, Object(Config\Cache), false)
#6 /application/public/index.php(45): CodeIgniter\CodeIgniter->run()
#7 {main}