update setup instructions

README.md

@@ -69,7 +69,6 @@ enable EPEL Repo (for instance because of fail2ban):
 # systemctl enable --now firewalld
 # firewall-cmd --add-service={http,https} --permanent
 # firewall-cmd --remove-service=cockpit --permanent
-# firewall-cmd --add-port=25/tcp --permanent     ; for Postfix
 # firewall-cmd --reload
 
 List Rules:
@@ -286,8 +285,6 @@ TimeoutStartSec=300
 WantedBy=multi-user.target default.target
 !!!!!!!!!!!!!!
 
-containers$ mkdir -p ~/.config/systemd/user/
-
 ```
 
 ### Setup Backend Services