Can't get nginx to work with Adminer nor phpMyadmin

[KC]

Hello

>> I want to be able to type http://ipaddress/phpmyadmin (or adminer)
>> and see its respective interface. But as it is now, I only get 404
>> error.
>
> If you want http://ipaddress/phpmyadmin and http://ipaddress/adminer to
> both work, you will probably want a single server{} block with all of
> the configuration.
>

I must say I do not understand those config files.

Say, I only want to make adminer work, and we have a segment that goes 
like that

server {
     listen      80;
     server_name example.org www.example.org;
     ...
}


Where am I supposed to put the subfolder name here? Why are there those 
"example.org" domain names, if I am not even using a domain at the moment?

All I want is to
http://192.168.0.2 to point to the index file in root html folder
and http://192.168.0.2/adminer to point to a html/adminer

And reading http://nginx.org/en/docs/http/request_processing.html is 
confusing for that reason - I see no references to subfolders, just some 
domains.

I suppose that the "location" bit is taking care of subfolders, but if 
this is so, then... that would mean there is nothing to be set in 
"server" blocks.

I just don't get it.

Cheers