Add a docker compose file for testing environment

[MartinFlores751]

Currently, the HTTP API testing environment requires a degree of manual setup.

It would be nice to have the HTTP API and the Keycloak image for testing be set up automatically alongside iRODS.

[korydraughn]

The following conversation needs to be considered when handling this issue: #424 (comment)

[korydraughn]

Make sure to set run_quota_tests to True in test/config.py when handling this issue.

Originally mentioned here: #457 (comment)