nginx severs welcome page instead of the project specified in config file

Hi I am trying to serve a react project from ec2 server. I am running an Ubuntu instance and using nginx to serve my react project. when accessing the public ip of my instance i am always getting welcome nginx page instead of my react project

server {
    listen 80;
    server_name <retracted> ;
    root /root/build;
    index index.html; # react by default generate the file in the build directory
    location / {
        try_files $uri $uri/ =404;
    }
}
server {
    listen 443 ssl http2 default_server;
    listen [::]:443 ssl http2 default_server;
    include snippets/self-signed.conf;
}