Add docker image build workflow

.github/workflows/docker-image.yml

@@ -0,0 +1,27 @@
+name: Docker Image CI
+
+on:
+  push:
+    branches: [ docker/* ]
+
+jobs:
+  login:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set Branch Name
+        run: echo "BRANCH_NAME=$(echo ${GITHUB_REF#refs/heads/docker/})" >> $GITHUB_ENV
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build the Docker image
+        run: |
+          docker build . -t ghcr.io/${{ github.repository }}:${{ env.BRANCH_NAME }}
+          docker push ghcr.io/${{ github.repository }}:${{ env.BRANCH_NAME }}