add cloudflare dyndns script

bin/cloudflare-dyndns.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+# Required env vars
+# CLOUDFLARE_ZONE="xxx"
+# CLOUDFLARE_DNS_RECORD_ID="xxx"
+# CLOUDFLARE_EMAIL="xxx"
+# CLOUDFLARE_KEY="xxx"
+
+# Update Cloudflare DNS record with current detected public IP
+# https://api.cloudflare.com/#dns-records-for-a-zone-patch-dns-record
+ function updateIp {
+   IPADDR=$(curl -s checkip.amazonaws.com)
+   echo $IPADDR
+
+   curl -X PATCH "https://api.cloudflare.com/client/v4/zones/$CLOUDFLARE_ZONE/dns_records/$CLOUDFLARE_DNS_RECORD_ID" \
+     -H "X-Auth-Email: $CLOUDFLARE_EMAIL" \
+     -H "X-Auth-Key: $CLOUDFLARE_KEY" \
+     -H "Content-Type: application/json" \
+    --data "{\"content\":\"$IPADDR\"}"
+ }
+
+ updateIp