[✨Feat]: Create gradle.yml

GitHub Actions으로 docker, Ec2 무중단 배포 설정

.github/workflows/gradle.yml

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+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+# This workflow will build a Java project with Gradle and cache/restore any dependencies to improve the workflow execution time
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-java-with-gradle
+
+name: Java CI with Gradle
+
+on:
+  push:
+    branches: [ "develop", "feat/*", "cicd/*", "fix/*", "hotfix/*", "refactor/*", "chore/*", "docs/*", "style/*", "test/*" ]
+  pull_request:
+    branches: [ "develop", "feat/*", "cicd/*", "fix/*", "hotfix/*", "refactor/*", "chore/*", "docs/*", "style/*", "test/*" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    # Spring Boot 어플리케이션 Build (1)
+    - name: Spring Boot Build
+      run: ./gradlew clean build --exclude-task test
+
+    # Docker 이미지 Build (2)
+    - name: docker image build
+      run: docker build -t rimi3226/gamegoo .
+
+    # DockerHub Login (3)
+    - name: docker login 
+      uses: docker/login-action@v2
+      with: 
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+    # Docker Hub push (4)
+    - name: docker Hub push
+      run: docker push rimi3226/gamegoo