translate chinese comment into english

backend/docker/Nginx/nginx.conf

@@ -1,6 +1,6 @@
-#运行用户,需要给文件目录访问权限
+# The user that nginx runs as, needs file directory access permissions
 user root;
-#启动进程,通常设置成和cpu的数量相等
+# The number of worker processes, usually set to be equal to the number of CPUs
 # worker_processes  1;
 worker_processes auto;
 pid /run/nginx.pid;