Create docker compose file

Related issues

Acceptance criteria

• Implemented code changes don't diverge from the related issue.
• Documentation reflects the status quo after merge.
• Version number is incremented according to SemVer. (Snapshot versions are not merged/released.)
• Only released versions of dependencies are used (i.e. no snapshot versions).
• Pipeline still works.
• GitLab issue is up-to-date.

If necessary, the following sections have been updated:

• Readme.md
• Documentation

Proposed squash commit message

Create docker compose file

* Add a second Dockerfile for docker compose.
* Add docker compose file and config files for the backend and postgres database.
* Set postgres as default dbms in application.properties for the ecmr-backend

Co-authored-by: default avatarLisa Gebel <lisa.gebel@iml.fraunhofer.de>