Adopt new hierarchy pattern

services/ddclient/volumes/data/postscript_gotify.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+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