Handle server setup

Handle server runs within backend container (dspace). During installation, the config must be manually created by calling /dspace/bin/make-handle-config, see https://github.com/dataquest-dev/dspace-angular/blob/dtq-dev/.github/workflows/deploy.yml#L93-L101 for all the steps necessary. docker-compose-rest.yml is prepared, so that the handle folder is in volume and entrypoint is set, so that on restart, handle server starts.