You can simply update your standalone approuter using cf push,
cd ~/projects/bookshop/app/approuter/
cf push bookshop-approuter # take your approuter name from the mta.yaml file
cd ~/projects/bookshop/
Tag: push
[Git] Branch Commands
https://git-scm.com/book/en/v2/Git-Branching-Basic-Branching-and-Merging
https://git-scm.com/book/en/v2/Git-Branching-Branch-Management
# create branch, switch to it and commit changes
git checkout -b hotfix
git commit -a -m 'Commit changes for fix'
# go back to main branch
git checkout main
# merge branch changes to main
git merge hotfix
# delete branch after merging, as it is not needed anymore
git branch -d hotfix
# check on which branch your are
git status
# list all branches including last commit on each branch
git branch -vv
# check which branches are already merged and which are not
git branch --merged
git branch --no-merged
# rename branche locally
git branch --move bad-branch-name corrected-branch-name
# push new name to github/gitlab
git push --set-upstream origin corrected-branch-name
# displays local and remote branches
git branch --all
# delete remote branch
git push origin --delete bad-branch-name
# push branch to remote
git push origin hotfix