[FIX] Documentation and docker workflow file (#449)

* fixes to documentation and docker

* fix to docker

* Apply suggestions from code review

Author: ravinkohli

.github/workflows/docker-publish.yml

@@ -24,6 +24,8 @@ jobs:
     steps:
       - name: Check out the repo
         uses: actions/checkout@v2
+        with:
+        submodules: recursive
 
       - name: Extract branch name
         shell: bash