[CI] Add workflow to synchronize ubuntu base image

.github/workflows/dockers-image-sync.yaml

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+#
+# Copyright (C) 2019-2024 vdaas.org vald team <[email protected]>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# You may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+name: "Sync Docker image"
+on:
+  # TODO: The following events are for debugging purposes so I will remove them before merging.
+  pull_request:
+
+  schedule:
+    - cron: "0 1 * * *"
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref != 'refs/heads/main' && github.ref || github.sha }}-${{ github.event_name }}
+  cancel-in-progress: true
+jobs:
+  dump-contexts-to-log:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/actions/dump-context
+  ubuntu-devel:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set Git config
+        run: |
+          git config --global --add safe.directory ${GITHUB_WORKSPACE}
+      - name: Setup Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          version: latest
+          platforms: linux/amd64,linux/arm64
+          driver-opts: |
+            image=moby/buildkit:master
+            network=host
+          buildkitd-flags: "--debug --oci-worker-gc=false"
+      - name: Login to DockerHub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USER }}
+          password: ${{ secrets.DOCKERHUB_PASS }}
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          # username: ${{ github.actor }}
+          # password: ${{ secrets.GITHUB_TOKEN }}
+          username: ${{ secrets.PACKAGE_USER }}
+          password: ${{ secrets.PACKAGE_TOKEN }}