Issues with SSL integration on DigitalOcean Server

I have purchased ssl from ipower and getting certificate and prive key, but as per the suggestion we have changed in /etc/nginx/site-enable in defualt page the below things :

server {

    listen 80;
    listen [::]:80;
      
    listen 443 ssl;
    listen [::]:443;
   
    root /var/www/abc.com;

    index index.php index.html index.htm index.nginx-debian.html;

    server_name abc.com www.abc.com;
   
    ssl_certificate /etc/nginx/ssl/abc.com.crt;
    ssl_certificate_key /etc/nginx/ssl/abc.com.key;
   

    location / {
        try_files $uri $uri/ /index.php?$args;
    }

    location = /favicon.ico { log_not_found off; access_log off; }
    location = /robots.txt { log_not_found off; access_log off; allow all; }
    location ~*  \.(jpg|jpeg|png|gif|ico|css|js)$ {
        expires 365d;
    }
   
    location ~*  \.(pdf)$ {
        expires 30d;
    }
   
    location ~ \.php$ {
        include snippets/fastcgi-php.conf;
        fastcgi_pass unix:/run/php/php7.0-fpm.sock;
    }
    location ~ /\.ht {
        deny all;
    }   

}

Please any one hepl with the steps for setup ssl on digital ocean.