How can I add a nginx domain host configuration?

I wanna add a domain that is hosted in PHP-FPM docker. My configuration (a simple example):

server {
    listen 80 default_server;

    index index.php index.html;
    server_name site1.local;
    # server_name _;
    error_log  /var/log/nginx/error.log;
    access_log /var/log/nginx/access.log;

    root /application/site1;
    client_max_body_size 12M;

    location / {
        index index.php index.html index.htm;
        try_files $uri $uri/ /index.php$is_args$args;
    }

    location ~ \.php$ {
        try_files $uri =404;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass php:9000;
        fastcgi_index index.php;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param PATH_INFO $fastcgi_path_info;
    }
}

I'm not getting how to add this!!! FYI, In fastcgi_pass php:9000;, php is container identity as you already know.

No file, test, or entry point is named; start by tracing how this project creates and configures proxy hosts, using the posted Nginx server block and PHP-FPM Docker setup as the scenario. Done means the supported way to add this domain and connect it to the PHP-FPM container is clearly documented or exposed by the project.