server {
    listen 80;
    server_name SERVER_NAME;
    
    return 301 https://$host$request_uri;
}

server {
    listen 443 ssl;
    server_name SERVER_NAME;

    ssl_certificate      /etc/letsencrypt/live/SERVER_NAME/fullchain.pem;
    ssl_certificate_key  /etc/letsencrypt/live/SERVER_NAME/privkey.pem;
    ssl_session_timeout  5m;
    ssl_protocols  TLSv1.2 TLSv1.3;
    ssl_ciphers  HIGH:!aNULL:!MD5;
    ssl_prefer_server_ciphers   on;

    client_max_body_size 1024m;

    location /group/signal {
        proxy_pass https://im.whatup.cc;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }

    location / {
        proxy_ssl_server_name on;
        proxy_ssl_verify off;

        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto https;
        
        proxy_pass https://im.whatup.cc;
    }
}