Docker-Compose Build Context Tag eigener Name
#It seems the docs/tool have been updated and you can now add the image tag to your script. This was successful for me.
#Example:
version: '2'
services:
baggins.api.rest:
image: my.image.name:rc2 <<----
build:
context: ../..
dockerfile: app/Docker/Dockerfile.release
ports:
...
https://docs.docker.com/compose/compose-file/#build
DreamCoder