Description

In completing #3074 , I found some of the container set up wasn't actually working fully. This PR fixes that:

• Add the mssql driver dependencies to the docker container
• Use host networking for the integration test container run so both the tests directly and the repot-execution container can talk to the DB using the same localhost connection string
• Add the DATABASE_CONN_STRING env var to the base compose and sample env
• Set up the docker compose in integration tests to use the sample env files
• Have the integration docker compose use the --build flag when setting up containers
• Add an integration test to prove it works