Simplify DDClient setup

utilities.docker-compose.yml

@@ -43,9 +43,10 @@ services:
       - gotify
     volumes:
       - ddclient_data:/data
+      - ddclient_init:/custom-cont-init.d:ro
     configs:
-      - source: ddclient
-        target: /config/ddclient.conf.tpl
+      - source: ddclient_config
+        target: /config/
     secrets:
       - source: ddclient_gotify_token
         target: gotify_token
@@ -72,12 +73,17 @@ volumes:
       type: none
       o: bind
       device: ${MOUNT_DIR?}/ddclient/data/
+  ddclient_init:
+    driver_opts:
+      type: none
+      o: bind
+      device: ${MOUNT_DIR?}/ddclient/cont-init/
 
 configs:
 #  smokeping:
 #    file: ${MOUNT_DIR?}/smokeping/config/
-  ddclient:
-    file: ${MOUNT_DIR?}/ddclient/config/ddclient.conf.tpl
+  ddclient_config:
+    file: ${MOUNT_DIR?}/ddclient/config/
 
 secrets:
   watchtower_gotify_token: