Added github workflows

.github/workflows/build-image.yaml

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+name: Build target image
+on:
+  workflow_call:
+    inputs:
+      registry:
+        description: 'Docker Registry'
+        required: true
+        type: string
+        default: 'ghcr.io'
+      image:
+        description: 'Image'
+        required: true
+        type: string
+      version:
+        description: 'Version'
+        required: true
+        type: string
+      platform:
+        description: 'Platform'
+        required: true
+        type: string
+      arch:
+        description: 'Architecture'
+        required: true
+        type: string
+jobs:
+  build:
+    name: Build
+    runs-on: ${{ inputs.platform == 'linux' && (inputs.arch == 'arm64' || inputs.arch == 'arm') && 'self-hosted' || 'ubuntu-latest' }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set tags
+        id: tags
+        run: |
+          echo "image=${{ inputs.registry }}/${{ github.repository_owner }}/${{ inputs.image }}-${{ inputs.platform }}-${{ inputs.arch }}" >> $GITHUB_OUTPUT
+          echo "tag=${{ inputs.version }}" >> $GITHUB_OUTPUT
+      - name: Login
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ inputs.registry }}
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build
+        run: |
+          docker build \
+            --tag ${{ steps.tags.outputs.image }}:${{ steps.tags.outputs.tag }} \
+            --build-arg ARCH=${{ inputs.arch }} \
+            --build-arg PLATFORM=${{ inputs.platform }} \
+            --build-arg VERSION=${{ inputs.version }} \
+            --file etc/docker/Dockerfile .
+      - name: Push
+        run: |
+          docker push ${{ steps.tags.outputs.image }}:${{ steps.tags.outputs.tag }}

.github/workflows/make-images.yaml

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+name: Make arm64 and amd64 docker images
+on:
+  workflow_dispatch:
+
+env:
+  registry: ghcr.io
+  image: coredns-nomad
+  version: v1.11.1
+
+jobs:
+  build-images:
+    strategy:
+      matrix:
+        platform: [ linux ]
+        arch: [ arm64, amd64 ]
+    uses: mutablelogic/go-coredns-nomad/.github/workflows/build-image.yaml@main
+    with:
+      registry: ghcr.io
+      image: coredns-nomad
+      version: v1.11.1
+      platform: ${{ matrix.platform }}
+      arch: ${{ matrix.arch }}
+  create-manifest:
+    needs:
+      - build-images
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set tags
+        id: tags
+        run: |
+          echo "manifest=${{ env.registry }}/${{ github.repository_owner }}/${{ env.image }}" >> $GITHUB_OUTPUT
+          echo "tag=${{ env.version }}" >> $GITHUB_OUTPUT
+      - name: Login
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.registry}}
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Create Manifest
+        run: |
+          docker manifest create ${{ steps.tags.outputs.manifest }}:${{ steps.tags.outputs.tag }} \
+            --amend ${{ steps.tags.outputs.manifest }}-linux-arm64:${{ steps.tags.outputs.tag }} \
+            --amend ${{ steps.tags.outputs.manifest }}-linux-amd64:${{ steps.tags.outputs.tag }}
+          docker manifest annotate --arch arm64 ${{ steps.tags.outputs.manifest }}:${{ steps.tags.outputs.tag }} \
+            ${{ steps.tags.outputs.manifest }}-linux-arm64:${{ steps.tags.outputs.tag }}
+          docker manifest annotate --arch amd64 ${{ steps.tags.outputs.manifest }}:${{ steps.tags.outputs.tag }} \
+            ${{ steps.tags.outputs.manifest }}-linux-amd64:${{ steps.tags.outputs.tag }}
+          docker manifest push ${{ steps.tags.outputs.manifest }}:${{ steps.tags.outputs.tag }}