The Solution of "curl: (6) Could not resolve host" Error with "nginx server_name"

#nginx

When I tried to reach out to the server that I named in nginx.conf, curl threw me an error:

curl myServerName.test:80

And then

"curl: (6) Could not resolve host: "

My nginx.conf

http{

     server {

        listen 80;
        server_name myServerName.test;


        return 200 "hello world!\n";
    }
}

The curl could not reach the host. I had to edit the /etc/hosts.

sudo nano /etc/hosts

and then /etc/hosts appeared like below

127.0.0.1       localhost

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

And added the myServerName.test after a space tab near the localhost. the last state of /etc/hosts :

127.0.0.1       localhost  myServerName.test

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

Tried the curl again