test

.drone.yml

@@ -42,6 +42,7 @@ steps:
   - name: build_php_base
     image: plugins/docker
     settings:
+      storage_driver: overlay
       storage_path: /drone/docker
       use_cache: true
       dockerfile: arbitry/docker/php/Dockerfile
@@ -61,6 +62,7 @@ steps:
   - name: build_php_fpm
     image: plugins/docker
     settings:
+      storage_driver: overlay
       storage_path: /drone/docker
       use_cache: true
       dockerfile: arbitry/docker/php-fpm/Dockerfile