Fail2ban: intrusion prevention/block suspicious IP addresses

Hello to all, i’m new and fresh on Vikunja.

I installed on my debian VPS via apt (installation problems using dpkg).
Opened port on UFW.
Created new user (with redirect error)…
but… security before all… i need to configure fail2ban!
Does someone feel the problem?

# Fail2Ban filter for Vikunja
# Revision: 20250226100000
#
# Log file: 
# Log example: 
#
# Notes:
#

[INCLUDES]
# Read common prefixes. If any customizations available -- read them from common.local
before = common.conf

[Definition]
_daemon = vikunja

failregex = ^%(__prefix_line)s.* SECURITY:[A-Z3_\-]+[:;][0-9A-F]+[:;]<HOST>[:;][0-9]+[:;]OP_FAIL[:;].*$

ignoreregex =

[Init]
# "maxlines" is number of log lines to buffer for multi-line regex searches
maxlines = 100

Do you have other tips for Vikunja security?