Added fail2ban, though not sure its configured correctly yet

docker/rootfs/fail2ban/action.d/hostsdeny.conf

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+## Version 2022/08/06
+# Fail2Ban configuration file
+#
+# Author: Cyril Jaquier
+# Edited for cross platform by: James Stout, Yaroslav Halchenko and Daniel Black
+#
+#
+
+[Definition]
+
+# Option:  actionstart
+# Notes.:  command executed on demand at the first ban (or at the start of Fail2Ban if actionstart_on_demand is set to false).
+# Values:  CMD
+#
+actionstart = 
+
+# Option:  actionstop
+# Notes.:  command executed at the stop of jail (or at the end of Fail2Ban)
+# Values:  CMD
+#
+actionstop = 
+
+# Option:  actioncheck
+# Notes.:  command executed once before each actionban command
+# Values:  CMD
+#
+actioncheck = 
+
+# Option:  actionban
+# Notes.:  command executed when banning an IP. Take care that the
+#          command is executed with Fail2Ban user rights.
+# Tags:    See jail.conf(5) man page
+# Values:  CMD
+#
+actionban = printf %%b "<daemon_list>: <ip_value>\n" >> <file>
+
+# Option:  actionunban
+# Notes.:  command executed when unbanning an IP. Take care that the
+#          command is executed with Fail2Ban user rights.
+# Tags:    See jail.conf(5) man page
+# Values:  CMD
+#
+actionunban = IP=$(echo "<ip_value>" | sed 's/[][\.]/\\\0/g') && sed -i "/^<daemon_list>: $IP$/d" <file>
+
+[Init]
+
+# Option:  file
+# Notes.:  hosts.deny file path.
+# Values:  STR  Default:  /etc/hosts.deny
+#
+file = /etc/hosts.deny
+
+# Option:  daemon_list
+# Notes:   The list of services that this action will deny. See the man page
+#          for hosts.deny/hosts_access. Default is all services.
+# Values:  STR  Default: ALL
+daemon_list = ALL
+
+# internal variable IP (to differentiate the IPv4 and IPv6 syntax, where it is enclosed in brackets):
+ip_value = <ip>
+
+[Init?family=inet6]
+ip_value = [<ip>]