Adopt new hierarchy pattern

services/ddclient/volumes/data/.gitignore

@@ -0,0 +1 @@
+!postscript_gotify.sh

services/ddclient/volumes/data/postscript_gotify.sh

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+#!/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