Use a vhost.d in current folder.

docker-compose.yml

@@ -12,7 +12,7 @@ services:
       - /var/www
       - /etc/nginx/conf.d
       - /etc/letsencrypt:/etc/letsencrypt:ro
-      - /var/docker/proxy/vhost.d:/etc/nginx/vhost.d:ro
+      - ./vhost.d:/etc/nginx/vhost.d:ro
 
   dockergen:
     image: jwilder/docker-gen:latest
@@ -29,3 +29,5 @@ services:
 networks:
   default:
     name: nginxproxy
+    external: true
+