Make playbook more general: Split into general and specific roles, use variables.

roles/lmn_network/tasks/main.yml

@@ -4,10 +4,10 @@
   ansible.builtin.copy:
     dest: /etc/apt/apt.conf
     content: >
-      Acquire::http::Proxy "http://aptcache.pn.steinbeis.schule:3142/";
+      {{ apt_conf }}
 
 - name: set ntp Server
   ansible.builtin.lineinfile:
     path: /etc/systemd/timesyncd.conf
     insertafter: '^#NTP='
-    line: NTP=server.pn.steinbeis.schule
+    line: NTP={{ ntp_serv }}