nginx configuration file

Hello,

I need an experienced dev who can configure my Nginx conf file.

Nginx host file

1. Remove directory from URL path
Ex: www.domain.com/d1/d2/d3/d4/index.php?value=username instead of this I need clean URL domain.com/username
2. Mapping wildcard subdomain based on username
example domain.com/username from this to this username.mydomain.com
3. Dynamic Map custom domain to wildcard subdomain
ex: username1.mydomain.com to username1.com
ex: username2.mydomain.com to username2.com
So please make a bit when you have experience.

Note: hope you understand the points dont ask explanation again

Thanks,