Testing method to share tag between repos

This is the first part of the method to share the server image tag between other repositories. It would be shared as tag.txt, which gets overwritten every time the image build runs.

.github/workflows/image_build_push.yml

@@ -6,7 +6,7 @@ name: docker image
 # events but only for the master branch
 on:
   push:
-    branches: [ master, gis-based-mode-detection ]
+    branches: [ master, gis-based-mode-detection, consolidate-differences ]
 
 
 # Env variable
@@ -46,3 +46,14 @@ jobs:
     - name: push docker image
       run: |
         docker push $DOCKER_USER/${GITHUB_REPOSITORY#*/}:${GITHUB_REF##*/}_${{ steps.date.outputs.date }}
+
+    - name: Write tag file 
+      run: |
+        echo 'foo bar' > tag.txt
+
+    - uses: actions/upload-artifact@v4
+      with:
+        name: Create tag artifact
+        path: tag.txt
+        if-no-files-found: error
+        overwrite: true