update readme

README.md

@@ -19,15 +19,18 @@ Install? PROBABLY NOT, this runs entirely in alpine and would be nice to isolate
 
 ### Admin general:
 
-    usermod -aG docker finn
+- `usermod -aG docker finn`
+- edit `/etc/systemd/journald.conf`
+- set or append `SystemMaxUse=500M`
 
 ### Admin firewall:
-
+```
     ufw default deny incoming
     ufw default allow outgoing
     ufw allow "OpenSSH"
     ufw allow "WWW Full"
     ufw enable
+```
 
 ### Admin dns: