Update main.yml

.github/workflows/main.yml

@@ -35,8 +35,20 @@ jobs:
         run: echo ${GITHUB_REF##*/}
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - uses: actions/checkout@v3
-#      - name: Create gh-pages branch if it doesn't exist
-#        uses: christopherdavenport/create-ghpages-ifnotexists@v1    
+      - name: Create gh-pages branch if it doesn't exist
+        run: |
+          git fetch origin
+          exists=`git show-ref refs/heads/gh-pages`
+          if [ -n "$exists" ]; then
+            echo 'gh-pages branch exists';
+          else
+            echo 'gh-pages branch does not exist, creating it';
+            git checkout --orphan gh-pages
+            git reset --hard
+            git commit --allow-empty -m "Initializing gh-pages branch"
+            git push origin gh-pages
+            git checkout ${GITHUB_REF##*/}
+          fi
       - name: Update the image to the latest publisher
         uses: docker://hl7fhir/ig-publisher-base:latest
         with: