fix pg setup

README.md

@@ -120,14 +120,14 @@ If you are feeling adventurous you can install postgresql using [docker](https:/
 
 Either way, you need to install this on your DB machine, which should be the one with the least amount of RAM.
 
-Go check the configuration of `/etc/postgresql/13/main/pg_hba.conf` and `/etc/postgresql/13/main/postgresql.conf` to make sure you can connect from `0.0.0.0`.
+Go check the configuration of `/etc/postgresql/15/main/pg_hba.conf` and `/etc/postgresql/15/main/postgresql.conf` to make sure you can connect from `0.0.0.0`.
 
 On the `pg_hba.conf` file add a line like that at the end:
 ```
-host    all             all             <the netmask you want to add>            md5
+host    all             all             <the netmask you want to add>            scram-sha-256
 ```
 
-Also change the `listen` instruction to `*`.
+Also change the `listen` instruction to `*` in `postgresql.conf`.
 
 ## Install Nginx