UI - copy from helpers, systemd service and instances page update

lua/api.lua

@@ -1,4 +1,4 @@
-local M		= {}
+local M			= {}
 local api_list	= {}
 local iputils	= require "resty.iputils"
 
@@ -10,6 +10,10 @@ api_list["^/reload$"] = function ()
 	return os.execute("/usr/sbin/nginx -s reload") == 0
 end
 
+api_list["^/stop$"] = function ()
+	return os.execute("/usr/sbin/nginx -s quit") == 0
+end
+
 function M.is_api_call (api_uri, api_whitelist_ip)
 	local whitelist = iputils.parse_cidrs(api_whitelist_ip)
 	if iputils.ip_in_cidrs(ngx.var.remote_addr, whitelist) and ngx.var.request_uri:sub(1, #api_uri) .. "/" == api_uri .. "/" then