[feat] develop에 워크플로우 적용

.github/workflows/docker-publish.yml

@@ -0,0 +1,38 @@
+name: CI/CD - Docker Image from DECS Branch
+
+on:
+  pull_request:
+    types: [closed]
+    branches: [ "develop" ]
+
+jobs:
+  build-and-push:
+    if: github.event.pull_request.merged == true
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_TOKEN }}
+
+      - name: Generate tag from branch name
+        id: generate_tag
+        run: |
+          BRANCH_NAME=${{ github.event.pull_request.head.ref }}
+          TAG_VERSION=${BRANCH_NAME#decs}
+          echo "Extracted tag version: $TAG_VERSION"
+          echo "TAG_NAME=$TAG_VERSION" >> $GITHUB_OUTPUT
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: |
+            dguailab/decs:${{ steps.generate_tag.outputs.TAG_NAME }}
+            dguailab/decs:latest