chore: refactor

doc/postgres-create-user.md

@@ -2,7 +2,7 @@
 
 * create a database user called `user name` with password `key`
 ```
-CREATE USER `user name` with encrypted password 'key';
+CREATE USER <user name> with encrypted password 'key';
 ```
 
 * OPTION: gant user `user name` access to database `database name`

doc/postgres.md

@@ -27,10 +27,6 @@ sudo systemctl restart postgresql
 systemctl status postgresql
 ```
 
-* when needed, create a database like [this](./postgres-create-db.md)
-
-* when needed, create a user like [this](./postgres-create-user.md)
-
 TODO: move the following description to dedicated setup files
 
 # Allow Remote Connections