docker: fix build

- Remove the dependency from the sendgrid-oai repo and prism.
- Build and start containers on test target on a single
statement.

This should fix the builds over the main branch, because
`docker-compose` is compose v1 which has been deprecated and
not installed on newest versions of github actions
`ubuntu-latest`.

more info:

https://docs.docker.com/compose/migrate/#what-are-the-differences-between-compose-v1-and-compose-v2

Makefile

@@ -11,5 +11,4 @@ test-integ: test
 
 version ?= latest
 test-docker:
-	curl -s https://raw.githubusercontent.com/sendgrid/sendgrid-oai/HEAD/prism/prism.sh -o prism.sh
-	version=$(version) bash ./prism.sh
+	docker compose up --build --parallel --force-recreate --abort-on-container-exit --remove-orphans