Create docker-image.yml

.github/workflows/docker-image.yml

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+name: Docker Image CI
+
+on:
+  push:
+    branches: [ "v9.16" ]
+  pull_request:
+    branches: [ "v9.16" ]
+
+jobs:
+
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Build the Docker image
+      run: |
+        docker buildx create --use --platform=linux/arm64,linux/amd64 --name multi-platform-bind9
+        docker buildx inspect --bootstrap
+        docker buildx build --platform=linux/arm64,linux/amd64 --tag my-image-name:$(date +%s)  -f ./Dockerfile .
+      shell: bash

README.md

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+# bind9-docker
+Read only mirror of https://gitlab.isc.org/isc-projects/bind9-docker, please submit issues and merge requests in the GitLab. 
+Any issues and merge requests opened here will be closed without a comment.
+
+This adds a basic docker build using buildx for multiplatform support.