Use googledomains and only notify when the IP changes

mounts/ddclient/config/ddclient.conf.tpl

@@ -5,8 +5,8 @@ ssl=yes                 # use ssl-support.  Works with
                         # ssl-library
 postscript=/data/postscript_gotify.sh # run script after updating.  The
                         # new IP is added as argument.
-
-usev4=webv4
+use=web
+web=googledomains
 
 ##
 ## CloudFlare (www.cloudflare.com)

mounts/ddclient/data/postscript_gotify.sh

@@ -1,7 +1,12 @@
 #!/bin/bash
-curl -s "$GOTIFY_ADDRESS/message" \
-    -X POST \
-    -H "X-Gotify-Key: $GOTIFY_TOKEN" \
-    -F "title=IP Address updated" \
-    -F "message=IP address detected as $1" \
-    -F "priority=5"
+
+if [ "$(cat /data/gotify_previous_ip || true)" != "$1" ]; then
+    echo -n "$1" > /data/gotify_previous_ip
+
+    curl -s "$GOTIFY_ADDRESS/message" \
+        -X POST \
+        -H "X-Gotify-Key: $GOTIFY_TOKEN" \
+        -F "title=IP Address updated" \
+        -F "message=IP address detected as $1" \
+        -F "priority=5"
+fi