feat: #14 - github actions yml 작성

.github/workflows/github-actions.yml

@@ -0,0 +1,43 @@
+name: issue-tracking-system CI/CD
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v3
+        with:
+          java-version: '17'
+
+      - name: Set up environment variables
+        run: |
+          echo "DB_URL=${{ secrets.DB_URL }}" >> $GITHUB_ENV
+          echo "DB_USERNAME=${{ secrets.DB_USERNAME }}" >> $GITHUB_ENV
+          echo "DB_PASSWORD=${{ secrets.DB_PASSWORD }}" >> $GITHUB_ENV
+
+      - name: Build with Gradle
+        run: ./gradlew build
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build Docker image
+        run: docker build -t ${{ secrets.DOCKERHUB_USERNAME }}/issue-tracking-system:latest .
+
+      - name: Push Docker image
+        run: docker push ${{ secrets.DOCKERHUB_USERNAME }}/issue-tracking-system:latest