Update internal

docker/networks/internal

@@ -1,7 +1,12 @@
     driver: macvlan
     driver_opts:
       parent: ${internal_interface}
+      com.docker.network.enable_ipv6: "${enable_ipv6:-false}"
     ipam:
       config:
         - subnet: ${internal_subnet}
           gateway: ${internal_gateway}
+{{ if eq "true" "${enable_ipv6:-false}" }}
+        - subnet: ${internal_subnet6}
+          gateway: ${internal_gateway6}
+{{end}