[add] Connecting to mysql from pdo

api-payroll/src/settings.php

@@ -26,7 +26,7 @@ return [
 
         // Datanase settings
         'mysql' => [
-            'host' => 'localhost',
+            'host' => 'mysql',
             'database' => 'payroll',
             'user' => 'root',
             'password' => '12345678',

docker-compose.yml

@@ -12,9 +12,9 @@ services:
   mysql:
     container_name: payroll_mysql
     restart: always
-    image: mysql:8.0.12
+    image: mysql:5.7
     ports:
-     - "3307:3306"
+     - "3306:3306"
     environment:
       MYSQL_ROOT_PASSWORD: '12345678'
       MYSQL_USER: 'sloth'