fixed volumes config for compose v3

docker-compose.yml

@@ -31,7 +31,7 @@ services:
       - conf:/etc/nginx/conf.d
       - vhost:/etc/nginx/vhost.d
       - html:/usr/share/nginx/html
-      - certs:/etc/nginx/certs
+      - certs:/etc/nginx/certs:ro
     logging:
       driver: none
 
@@ -40,9 +40,11 @@ services:
     container_name: dockergen
     restart: always
     command: -notify-sighup nginx -watch /etc/docker-gen/templates/nginx.tmpl /etc/nginx/conf.d/default.conf
-    volumes_from:
-      - nginx
     volumes:
+      - conf:/etc/nginx/conf.d
+      - vhost:/etc/nginx/vhost.d
+      - html:/usr/share/nginx/html
+      - certs:/etc/nginx/certs:ro
       - /var/run/docker.sock:/var/run/docker.sock:ro
 
   letsencrypt:
@@ -51,9 +53,12 @@ services:
     restart: always
     environment:
       NGINX_DOCKER_GEN_CONTAINER: dockergen
-    volumes_from:
-      - nginx
-      - dockergen
+    volumes:
+      - conf:/etc/nginx/conf.d
+      - vhost:/etc/nginx/vhost.d
+      - html:/usr/share/nginx/html
+      - certs:/etc/nginx/certs:rw
+      - /var/run/docker.sock:/var/run/docker.sock:ro
 
 volumes:
   conf: