chore: removed mysql in docker

docker-compose.yml

@@ -1,21 +1,10 @@
 version: "3"
 
 services:
-  mysql:
-    image: mariadb/server:10.5
-    container_name: mysqlBeta
-    hostname: mysql
-    env_file:
-      - .env.mysql.local
-    command:
-      - --character-set-server=utf8mb4
-      - --collation-server=utf8mb4_unicode_ci
-    volumes:
-      - /home/ubuntu/mysql-beta:/var/lib/mysql
   koreanbots:
     container_name: koreanbots
     build: .
     ports:
       - 4000:3000
-    env_file:
-      - .env.production.local
+    links:
+      - mysql