build: mysql 컨테이너 포트 추가

Author: nuyh99

.github/workflows/deploy.yml

@@ -20,6 +20,7 @@ jobs:
         uses: mirromutth/[email protected]
         with:
           host port: 20000
+          container port: 3306
           mysql root password: password
           mysql database: busan
           mysql user: root