add workflow_dispatch

Author: nixielectra

.github/workflows/docker.yml

@@ -2,6 +2,7 @@ name: Build Docker Image
 on:
   release:
     types: [published]
+  workflow_dispatch:
 jobs:
   Docker-Buildx:
     runs-on: ubuntu-latest
@@ -32,4 +33,4 @@ jobs:
       - name: Buildx Dockerfile
         run: |
           chmod -R 755 scripts
-          ./scripts/buildx-nixie
+          ./scripts/buildx-nixie