ci: ✨ Build a multiplatform image instead

.gitea/workflows/build.yml

@@ -22,7 +22,9 @@ jobs:
         tags: |
           type=sha
           type=raw,value=latest,enable={{is_default_branch}}
-          type=semver,pattern={{version}}                              
+          type=semver,pattern={{version}}        
+    - name: Set up Docker Buildx
+      uses: https://github.com/docker/setup-buildx-action@v3
     - name: Build and push Docker image
       uses: https://github.com/docker/build-push-action@master
       with:
@@ -31,3 +33,4 @@ jobs:
         push: true
         tags: ${{ steps.meta.outputs.tags }}
         labels: ${{ steps.meta.outputs.labels }}
+        platforms: linux/amd64,linux/arm64