switch docker image

deploy/nginx/nginx.conf

@@ -1,4 +1,4 @@
-user nginx;
+user www-data;
 daemon off;
 pid /tmp/nginx.pid;
 worker_processes auto;
@@ -63,4 +63,3 @@ add_header X-XSS-Protection "1; mode=block" always;
     # }
 
 }
-