feat: limbo_actions/buildkit-build-push: filename argument

.gitea/limbo_actions/buildkit-build-push/action.yaml

@@ -25,6 +25,10 @@ inputs:
     description: "buildctl build dockerfile/folder"
     required: true
     default: "."       
+  filename:
+    description: "Docker file name (Default: Dockerfile)"
+    required: true
+    default: "Dockerfile"   
 runs:
   using: "composite"
   steps:
@@ -59,7 +63,7 @@ runs:
           --frontend=dockerfile.v0 \
           --local context=${{ inputs.context }} \
           --local dockerfile=${{ inputs.dockerfile }} \
-          --opt filename=Dockerfile \
+          --opt filename=${{ inputs.filename }} \
           --output type=image,name=${{ inputs.tags }},push=true