When going to my server in the browser, it shows the CentOS welcome page instead of nginx. How can I fix that?

I am running CentOS 7 on a droplet that I’ll be using as a web server. When I go to http://my_server_ip, it displays the “Welcome to CentOS” page.

I’ve followed the instructions to install, start, and enable nginx, but I still see the CentOS (not the nginx) welcome page.

Instructions from DO on installing nginx that I followed: https://www.digitalocean.com/community/tutorials/how-to-install-nginx-on-debian-10

I also found that even when I turn off nginx, I still am able to get to that webpage, so it leads me to believe that this is interfering somehow.

I’ve also run the command “sudo netstat -tulpn” with the following result, but I don’t see anything listening on port 80, so I’m a bit confused:

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      1038/master         
tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN      1/systemd           
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      27452/sshd          
tcp6       0      0 ::1:25                  :::*                    LISTEN      1038/master         
tcp6       0      0 :::111                  :::*                    LISTEN      1/systemd           
tcp6       0      0 :::22                   :::*                    LISTEN      27452/sshd          
udp        0      0 0.0.0.0:111             0.0.0.0:*                           1/systemd           
udp        0      0 10.10.0.5:123           0.0.0.0:*                           10653/ntpd          
udp        0      0 192.241.142.66:123      0.0.0.0:*                           10653/ntpd          
udp        0      0 127.0.0.1:123           0.0.0.0:*                           10653/ntpd          
udp        0      0 0.0.0.0:123             0.0.0.0:*                           10653/ntpd          
udp        0      0 0.0.0.0:698             0.0.0.0:*                           2643/rpcbind        
udp6       0      0 :::111                  :::*                                1/systemd           
udp6       0      0 fe80::585f:e3ff:fe7:123 :::*                                10653/ntpd          
udp6       0      0 ::1:123                 :::*                                10653/ntpd          
udp6       0      0 :::123                  :::*                                10653/ntpd          
udp6       0      0 :::698                  :::*                                2643/rpcbind 

How can I fix this?