Add FFMD DNS container to provide secondary DNS server

tau.yml

@@ -151,3 +151,15 @@
       vars:
         site_name: "{{ dokuwiki_domain }}"
         proxy_port: "{{ dokuwiki_port }}"
+
+
+    - name: Setup container for secondary FFMD DNS
+      docker_container:
+        name: bind9-md-freifunk-net
+        image: "ffmd/bind9-md-freifunk-net:2022062601"
+        pull: true
+        state: started
+        restart_policy: unless-stopped
+        detach: yes
+        ports:
+        - "53:53/udp"