Add workflow_dispatch trigger to Docker build

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: oskarrisberg

.github/workflows/docker-build.yml

@@ -5,6 +5,7 @@ on:
     branches: [main, master]
   pull_request:
     branches: [main, master]
+  workflow_dispatch:
 
 env:
   REGISTRY: ghcr.io