chore: 테스트 서버 mysql 설치 스크립트 작성

.ebextensions/install_mysql.config

@@ -0,0 +1,22 @@
+packages:
+  yum:
+    mysql-server: []
+    mysql: []
+
+commands:
+  01_start_mysql:
+    command: "service mysqld start"
+  02_create_database:
+    command: "mysql -e 'CREATE DATABASE IF NOT EXISTS ddingdong_test;'"
+  03_create_user:
+    command: "mysql -e \"CREATE USER IF NOT EXISTS 'myuser'@'localhost' IDENTIFIED BY 'ddingdong';\""
+  04_grant_privileges:
+    command: "mysql -e \"GRANT ALL PRIVILEGES ON myapp.* TO 'myuser'@'localhost';\""
+  05_flush_privileges:
+    command: "mysql -e 'FLUSH PRIVILEGES;'"
+
+services:
+  sysvinit:
+    mysqld:
+      enabled: true
+      ensureRunning: true