nginx does not start after server restart in the RHEL 8

Issue

When restarting the server, the nginx service does not start automatically, as it does not resolve the hostname in the upstream configuration:

upstream test {
    ip_hash;
    server      test.example.com;

The error message:

host not found in upstream "test.example.com" in /etc/nginx/conf.d/configfile.conf:4

After that the server is up, nginx starts without issues.