The image would extend the one available here:
Target versions are 9.3, 9.4, 9.5, 9.6, one image per version.
Database can be initialized through SQL, see here:
More details on Nuxeo specifics here:
The DB version will then be handled in compose files through a PGSQL_VERSION variable (with a default value matching the Nuxeo version).
Add compose file for simple Nuxeo + DB scenario.