Hide buttons for disabled features #105
Description
Previously we had a gin@home fork and container image that was modified for on-premise deployments of GIN. The modifications disabled features and UI elements that require extra (micro)services that we run ourselves:
- Data search (gindex)
- Dataset publication (gin-doi)
Maintaining a fork with these changes is cumbersome. Instead we should hide the UI elements (e.g., the Request DOI button) when the service is not configured.