Redirect to https & non-www in NGINX

server {
    listen 80;
    listen [::]:80 default_server ipv6only=on;
    server_name example.com www.example.com
    return 301 https://example.com$request_uri;
}

server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name www.example.com;
    ssl_certificate chain.pem;
    ssl_certificate_key key.pem;
    return 301 https://example.com$request_uri;
}

server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name example.com;
    ssl_certificate chain.pem;
    ssl_certificate_key key.pem;

    location / {
        ......
    }
}