detect vsi recipes in the Dockerfile and automatically build them

[scott-vsi]

Detect vsi recipes being used in the Dockerfile and automatically build them. A problem I have run into is forgetting to add the recipe to the just build line. While the recipe works the first time, because it is downloaded from dockerhub, subsequent updates to the recipe are not automatically picked up (e.g., an updated pipenv recipe).

[scott-vsi]

The alternative is to prefix the recipe with the PROJECT_NAME. That way, it will fail the first time, and you will be reminded (if a little obliquely) that you need to add recipe to the justify line.

This can be combined with #97 to detect this error from the output of docker-compose to clarify the error in a user friendly way.