Setup docker build (#2)

Author: devksingh4

.github/workflows/build.yml

@@ -0,0 +1,129 @@
+name: Build Multi-Arch Docker Image
+
+on:
+    workflow_dispatch:
+        inputs:
+            BWDC_VERSION:
+                description: "BWDC Version (used as build arg and image tag)"
+                required: true
+                type: string
+    push:
+        tags:
+            - "v*"
+
+env:
+    REGISTRY: ghcr.io
+    IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+    build:
+        strategy:
+            matrix:
+                include:
+                    - platform: linux/amd64
+                      runner: ubuntu-latest
+                    - platform: linux/arm64
+                      runner: ubuntu-24.04-arm
+
+        runs-on: ${{ matrix.runner }}
+
+        permissions:
+            contents: read
+            packages: write
+
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+
+            - name: Set version
+              id: version
+              run: |
+                  if [ -n "${{ inputs.BWDC_VERSION }}" ]; then
+                    echo "version=${{ inputs.BWDC_VERSION }}" >> $GITHUB_OUTPUT
+                  else
+                    echo "version=${GITHUB_REF_NAME#v}" >> $GITHUB_OUTPUT
+                  fi
+
+            - name: Log in to registry
+              uses: docker/login-action@v3
+              with:
+                  registry: ${{ env.REGISTRY }}
+                  username: ${{ github.actor }}
+                  password: ${{ secrets.GITHUB_TOKEN }}
+
+            - name: Set up Docker Buildx
+              uses: docker/setup-buildx-action@v3
+
+            - name: Extract platform name
+              id: platform
+              run: |
+                  PLATFORM=${{ matrix.platform }}
+                  echo "name=${PLATFORM//\//-}" >> $GITHUB_OUTPUT
+
+            - name: Build and push by digest
+              id: build
+              uses: docker/build-push-action@v6
+              with:
+                  context: .
+                  platforms: ${{ matrix.platform }}
+                  build-args: |
+                      BWDC_VERSION=${{ steps.version.outputs.version }}
+                  outputs: type=image,name=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true
+
+            - name: Export digest
+              run: |
+                  mkdir -p /tmp/digests
+                  digest="${{ steps.build.outputs.digest }}"
+                  touch "/tmp/digests/${digest#sha256:}"
+
+            - name: Upload digest
+              uses: actions/upload-artifact@v4
+              with:
+                  name: digests-${{ steps.platform.outputs.name }}
+                  path: /tmp/digests/*
+                  if-no-files-found: error
+                  retention-days: 1
+
+    merge:
+        runs-on: ubuntu-latest
+        needs: build
+
+        permissions:
+            contents: read
+            packages: write
+
+        steps:
+            - name: Set version
+              id: version
+              run: |
+                  if [ -n "${{ inputs.BWDC_VERSION }}" ]; then
+                    echo "version=${{ inputs.BWDC_VERSION }}" >> $GITHUB_OUTPUT
+                  else
+                    echo "version=${GITHUB_REF_NAME#v}" >> $GITHUB_OUTPUT
+                  fi
+
+            - name: Download digests
+              uses: actions/download-artifact@v4
+              with:
+                  path: /tmp/digests
+                  pattern: digests-*
+                  merge-multiple: true
+
+            - name: Log in to registry
+              uses: docker/login-action@v3
+              with:
+                  registry: ${{ env.REGISTRY }}
+                  username: ${{ github.actor }}
+                  password: ${{ secrets.GITHUB_TOKEN }}
+
+            - name: Create manifest list and push
+              working-directory: /tmp/digests
+              run: |
+                  docker buildx imagetools create \
+                    -t ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.version.outputs.version }} \
+                    -t ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest \
+                    $(printf '${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@sha256:%s ' *)
+
+            - name: Inspect image
+              run: |
+                  docker buildx imagetools inspect ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.version.outputs.version }}