init submodules

Author: ravinkohli

.github/workflows/docker-publish.yml

@@ -24,7 +24,9 @@ jobs:
     steps:
       - name: Check out the repo
         uses: actions/checkout@v2
-
+        with:
+          submodules: recursive
+  
       - name: Extract branch name
         shell: bash
         run: echo "##[set-output name=branch;]$(echo ${GITHUB_REF#refs/heads/})"