user can configure a couchdb database server for use with vodle

[mensch72]

on a dedicated "servers" page, all used servers are listed and via an add button, the user gets to a page where the procedure for setting up a vodle server is described:

• installing and starting a couchdb instance (e.g. via docker)
• setting an admin user and password on the server
  finally, it offers a button "configure the new server", asks for the admin credentials, and then uses couchdb-bootstrap to copy the necessary user and design docs included under src/couchdb to the new server.