mongodb: use host networking & bind to v6

Author: jb3

ansible/roles/mongodb/templates/mongodb.container.j2

@@ -10,13 +10,17 @@ Volume = mongodb.volume:/data/db
 # XXX: role should to have a dependency for the lovelace cert
 Volume = /etc/opt/mongodb:/certs:ro
 NoNewPrivileges = true
-PublishPort = 27017:27017
+Network=host
 Exec = \
   --auth \
   --tlsMode requireTLS \
   --tlsCertificateKeyFile /certs/fullchain-plus-key.pem \
   --tlsCAFile /certs/fullchain.pem \
-  --tlsAllowConnectionsWithoutCertificates
+  --tlsAllowConnectionsWithoutCertificates \
+  --ipv6
+
+[Network]
+IPv6=true
 
 [Service]
 # Resource control