add obdiag build docker

.github/workflows/build_base_docker.yml

@@ -0,0 +1,38 @@
+name: build docker
+
+on:
+  pull_request:
+    branches:
+      - master
+  push:
+    branches:
+      - master
+
+jobs:
+  build-docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to Docker hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Create and push manifests w/o cache
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          platforms: linux/amd64
+          file: build/Dockerfile
+          push: true
+          tags: |
+            ${{ vars.DOCKER_PUSH_BASE }}/oceanbase/obdiag-builder:latest