Local compose: build only if image not available, during compose up, except with --build

[gtardif]

docker compose up will build service image if a service has an image section.
it should first check if the image is already available locally and use it without rebuilding if available.
users can force rebuilding images with docker compose up --build

When docker compose up must build the image because it is not available locally, it should warn the user it does so only the first time, and let the user know they can for rebuild with --build

(to replicate docker-compose behaviour)