How do you manage the site check page?

I'm worried because the site inspection page is an important part of the service operation.

What you can usually think of is

When you receive a uri request, you modify the .htaccess file in that folder to look at the check page of the same path.

But in that case, the problem is not a management problem if there is only the service If there are several services other than the service, there is a problem that the service inspection page has to be managed separately for management, and the service inspection page is subordinate to the project

There are a and b services under home, and the general service check page management folder named z is located in the same route I was going to manage it by changing the vhost for auri from a to z.

The problem here is that you need to restart the web server, such as Apache.

When you have one universal check page described above and you can't even restart the web server due to various internal problems Is there any other way to display a check page other than using vhost?

I wonder how you manage other services.