You have multiple ways to achieve this. I give you one of them.
First, define the name of your frontend file as docker-foo@ .
Now at your @ execute field do:
@ execute = (execline-cd /home/@ I/foo-docker docker-compose up)
Finally at your enable time, do
# 66-enable docker-foo@ wastelander
the parser will replace all @ I occurrence found inside the frontend file by wastelander. So, your execline-cd /home/@ I/foo-docker becomes execline-cd /home/wastelander/foo-docker at the end of the enable process.