1. Change db settings in CMakeLists.txt in concordia-server repo
2. Rebuild docker-compose and check if concordia-server connects to db via internal "docker-compose" network
3. do not expose concordia-postgres ports if the above works
4. Move scripts in the tests folder of concordia-server repo to the concordia-docker. Adjust them accordingly (host, port)
5. sort out the lemmagen