Add note about \l command

docs/installation/1-postgresql.md

@@ -63,7 +63,7 @@ GRANT CREATE ON SCHEMA public TO netbox;
     **Do not use the password from the example.** Choose a strong, random password to ensure secure database authentication for your NetBox installation.
 
 !!! danger "Use UTF8 encoding"
-    Make sure that your database uses `UTF8` encoding (the default for new installations). Especially do not use `SQL_ASCII` encoding, as it can lead to unpredictable and unrecoverable errors.
+    Make sure that your database uses `UTF8` encoding (the default for new installations). Especially do not use `SQL_ASCII` encoding, as it can lead to unpredictable and unrecoverable errors. Enter `\l` to check your encoding.
 
 Once complete, enter `\q` to exit the PostgreSQL shell.