Set up fail2ban for nginx, move IPFS gateway to proxy role

cookbooks/fail2ban/templates/slack_notify.sh.erb

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+# message first command argument
+MESSAGE=$1
+HOOK_URL=<%= @slack_webhook %>
+HOST=$(hostname)
+
+CHANNEL="#<%= @slack_channel %>"
+USERNAME="fail2ban"
+ICON=":cop:"
+
+# ip second command argument
+IP=$2
+# lets find out from what country we have our hacker
+COUNTRY=$(curl ipinfo.io/${IP}/country)
+# converting country to lover case. I love you bash script =\
+COUNTRY=$(echo "$COUNTRY" | tr -s  '[:upper:]'  '[:lower:]')
+# slack emoji
+COUNTRY=":flag-$COUNTRY:"
+
+# replace _country_ template to the country emoji
+MESSAGE="${MESSAGE/_country_/$COUNTRY}"
+
+curl -X POST --data-urlencode "payload={\"channel\": \"${CHANNEL}\", \"username\": \"${USERNAME}\", \"text\": \"[${HOST}] ${MESSAGE}\", \"icon_emoji\": \"${ICON}\"}" ${HOOK_URL}
+
+exit 0