Disable host check on healthcheck path (mastodon#16243)

Author: tribela

config/initializers/1_hosts.rb

@@ -31,5 +31,6 @@
     config.hosts << host if host.present?
     config.hosts << web_host if web_host.present?
     config.hosts.concat(alternate_domains) if alternate_domains.present?
+    config.hosts_authorization = { exclude: ->(request) { request.path == '/health' } }
   end
 end