logs: standardise log filenames to xamxam-{service}-{date}.log

nginx/README.md

@@ -100,8 +100,8 @@ sudo nginx -t
 
 ```bash
 # Watch logs
-sudo tail -f /var/log/nginx/xamxam_access.log
-sudo tail -f /var/log/nginx/xamxam_error.log
+sudo tail -f /var/log/nginx/xamxam-nginx-access.log
+sudo tail -f /var/log/nginx/xamxam-nginx-error.log
 
 # Check nginx status
 sudo systemctl status nginx