⏫ Forwardport of #11690 to 2.3-develop branch

Applied pull request patch https://github.com/magento/magento2/pull/11690.patch (created by @andrewhowdencom) based on commit(s):
  1. 73178d8

Fixed GitHub Issues in 2.3-develop branch:
  - #11157: nginx.sample.conf missing heath_check.php? (reported by @craigcarnell)

nginx.conf.sample

@@ -162,7 +162,7 @@ location /media/import/ {
 }
 
 # PHP entry point for main application
-location ~ (index|get|static|report|404|503)\.php$ {
+location ~ (index|get|static|report|404|503|health_check)\.php$ {
     try_files $uri =404;
     fastcgi_pass   fastcgi_backend;
     fastcgi_buffers 1024 4k;