Documentation should include which specific SQL Server permissions are required

[Reisclef]

On the page https://github.com/HangfireIO/Hangfire.Documentation/blob/master/configuration/using-sql-server.rst it references the Install.sql, as well as mentioning in passing which permissions it needs.

Clearly it needs db_reader and db_writer, as well as CREATE/ALTER/DROP Table/Index, but it feels like it would be useful to include the minimum SQL rights that the Hangfire user would need within the documentation.