chore: add pull request trigger to Docker publish workflow

- Introduced a pull request trigger for the Docker publish workflow on the main branch to enhance CI/CD processes.

Author: SwaroopH

.github/workflows/docker-publish.yml

@@ -12,6 +12,8 @@ on:
     branches: [ "main", "dockerify", "experimental"]
     # Publish semver tags as releases.
     tags: [ 'v*.*.*' ]
+  pull_request:
+    branches: [ "main" ]
 
 env:
   # Use docker.io for Docker Hub if empty