use global variable for dns repo url

roles/ffhl_nameserver/tasks/powerdns.yml

 ---
-
-
-
 - name: copy dnsdist configs
   copy:
     src: dnsdist
@@ -26,11 +23,14 @@
 
 # add update script
 - name: copy update script
-  copy:
-    src: scripts/update-dns.sh
+  template:
+    src: update-dns.sh
     dest: /usr/local/lib/ffhl/
     mode: 775
 
+- name: run dns-update script
+  shell:
+    cmd: /usr/local/lib/ffhl/update-dns.sh
 
 - name: copy systemd services and timers
   copy:

roles/ffhl_nameserver/files/scripts/update-dns.sh → roles/ffhl_nameserver/templates/update-dns.sh

@@ -2,8 +2,8 @@
 set -e
 
 DIR=$(mktemp -d)
-DEST=/var/local/ffhl-dns
-REPO=https://git.luebeck.freifunk.net/FreifunkLuebeck/ffhl-dns.git
+DEST="/var/local/ffhl-dns"
+REPO="{{ dns_repo_url }}"
 
 mkdir -p "$DEST"
 git clone "$REPO" "$DIR"