nginx.conf

server {
    server_name  api.example.com;

    #access_log  /var/log/nginx/host.access.log  main;

    location / {
        proxy_pass http://127.0.0.1:8080/;
    }

    # redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    }

    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/api.example.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/api.example.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}

server {
    if ($host = api.example.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    listen       80;
    server_name  api.example.com;
    return 404; # managed by Certbot


}