* Update faq.md

Clarify that using same database for different applications is only for MySQL. Fix minor spelling and grammar.

* Create faq.md

Clarify that TableNamePrefix option is only for MySQL. Minor spelling and grammar corrections.

Change from `FromService` to `FromServices`.
Ref:
https://docs.microsoft.com/en-us/dotnet/api/microsoft.aspnetcore.mvc.fromservicesattribute

Changed the misprint of Postgre to SqlServer

* Updates english documentation

* updates english documentation

Co-authored-by: Fu Diwei <fudiwei@RHQYZ-iMacBookA1398.local>