Enhance CI and release workflows with multi-architecture support and build optimizations

.github/workflows/ci.yml

@@ -77,6 +77,7 @@ jobs:
         with:
           context: .
           push: ${{ github.event_name != 'pull_request' }}
+          platforms: linux/amd64  # Fast build - amd64 only
           tags: |
             ghcr.io/${{ steps.meta.outputs.repo_owner }}/${{ steps.meta.outputs.repo_name }}:${{ steps.meta.outputs.branch_tag }}
             ghcr.io/${{ steps.meta.outputs.repo_owner }}/${{ steps.meta.outputs.repo_name }}:${{ steps.version.outputs.version }}-${{ steps.version.outputs.build }}

.github/workflows/release.yml

@@ -44,6 +44,12 @@ jobs:
           REPO_OWNER=$(echo "${{ github.repository_owner }}" | tr '[:upper:]' '[:lower:]')
           echo "lowercase=$REPO_OWNER" >> $GITHUB_OUTPUT
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v2
         with:
@@ -63,9 +69,13 @@ jobs:
         with:
           context: .
           push: true
+          platforms: linux/amd64,linux/arm64,linux/arm/v7  # Multi-arch support for releases
           tags: |
             ghcr.io/${{ steps.repo_owner.outputs.lowercase }}/dispatcharr:latest
             ghcr.io/${{ steps.repo_owner.outputs.lowercase }}/dispatcharr:${{ steps.update_version.outputs.new_version }}
+          build-args: |
+            BRANCH=main  # Always use main branch for releases
+            REPO_URL=https://github.com/${{ github.repository }}
           file: ./docker/Dockerfile
 
       - name: Create GitHub Release