chore: CI GitHub Actions 수정

Node.js를 v22.16.0으로 변경한다.
필요 없는 DockerHub 로그인 단계를 제거한다.

Author: JHyeok

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  NODE_VERSION: 22.11.0
+  NODE_VERSION: 22.16.0
 
 jobs:
   build:
@@ -60,12 +60,6 @@ jobs:
       - name: Create .env file
         run: cp .env.example .env
 
-      - name: Login to Docker Hub
-        uses: docker/login-action@v3
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
       - name: Start MySQL using Docker Compose
         run: docker compose up -d