Added fail2ban, though not sure its configured correctly yet

docker/rootfs/fail2ban/action.d/mail-whois-lines.conf

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+## Version 2022/08/06
+# Fail2Ban configuration file
+#
+# Author: Cyril Jaquier
+# Modified-By: Yaroslav Halchenko to include grepping on IP over log files
+#
+
+[INCLUDES]
+
+before = mail-whois-common.conf
+         helpers-common.conf
+
+[Definition]
+
+# bypass ban/unban for restored tickets
+norestored = 1
+
+# 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 = printf %%b "Hi,\n
+              The jail <name> has been started successfully.\n
+              Regards,\n
+              Fail2Ban" | <mailcmd> "[Fail2Ban] <name>: started on <fq-hostname>" <dest>
+
+# Option:  actionstop
+# Notes.:  command executed at the stop of jail (or at the end of Fail2Ban)
+# Values:  CMD
+#
+actionstop = printf %%b "Hi,\n
+             The jail <name> has been stopped.\n
+             Regards,\n
+             Fail2Ban" | <mailcmd> "[Fail2Ban] <name>: stopped on <fq-hostname>" <dest>
+
+# 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
+#
+
+_ban_mail_content = ( printf %%b "Hi,\n
+            The IP <ip> has just been banned by Fail2Ban after
+            <failures> attempts against <name>.\n\n
+            Here is more information about <ip> :\n"
+            %(_whois_command)s;
+            printf %%b "\nLines containing failures of <ip> (max <grepmax>)\n";
+            %(_grep_logs)s;
+            printf %%b "\n
+            Regards,\n
+            Fail2Ban" )
+
+actionban = %(_ban_mail_content)s | <mailcmd> "[Fail2Ban] <name>: banned <ip> from <fq-hostname>" <dest>
+
+# 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 = 
+
+[Init]
+
+# Option:  mailcmd
+# Notes.:  Your system mail command. Is passed 2 args: subject and recipient
+# Values:  CMD
+#
+mailcmd = mail -E 'set escape' -s
+
+# Default name of the chain
+#
+name = default
+
+# Destinataire of the mail
+#
+dest = root
+
+# Path to the log files which contain relevant lines for the abuser IP
+#
+logpath = /dev/null
+
+# Number of log lines to include in the email
+#
+#grepmax = 1000
+#grepopts = -m <grepmax>