Merge branch 'add/branch-opt' into 'main'

Make branch variable, for multidev

See merge request !9

pantheon/default.yml

@@ -73,4 +73,4 @@ git-push:
     - git diff --exit-code
     - git status -s
     - git log -n 1
-    - git push --force pantheon master
+    - git push --force pantheon "$PANTHEON_GIT_BRANCH"