ci: bind mysql on test workflow and use 127.0.0.1 as DB host

Ref: b4ff7c4
Ref: 7ed618b

.github/workflows/tests.yml

@@ -15,6 +15,8 @@ jobs:
                     MYSQL_USER: sys
                     MYSQL_PASSWORD: password
                 options: --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
+                ports:
+                    - "3308:3306"
         steps:
             - name: Checkout repository
               uses: actions/checkout@v2
@@ -35,7 +37,7 @@ jobs:
                   composer install --no-suggest --no-interaction --optimize-autoloader
             - name: Run unit tests
               env:
-                  DB_HOST: mysql
+                  DB_HOST: 127.0.0.1
                   DB_PORT: ${{ job.services.mysql.ports['3306'] }}
                   DB_DATABASE: api_db
                   DB_USERNAME: sys