Add input 'branch' in build-docker-images.yaml (#147)

Co-authored-by: zhiyaoPCCW <[email protected]>
Co-authored-by: Dave Xiong <[email protected]>

.github/workflows/build-docker-images.yaml

@@ -2,6 +2,12 @@
 name: Build docker images
 on:
   workflow_dispatch:
+    inputs:
+      branch:
+        description: 'The branch checkout'
+        required: false
+        type: string
+        default: ''
 
 jobs:
   container_build:
@@ -10,6 +16,8 @@ jobs:
     steps:
       - name: Check out the repo
         uses: actions/checkout@v4
+        with:
+          ref: ${{ inputs.branch }}
 
       - name: Get the current version
         id: vars