nginx.conf

events {
    worker_connections 1024;
}

http {
    upstream guacamole {
        server guacamole:8080;
    }

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

    server {
        listen 443 ssl;
        http2 on;
        server_name ${SERVER_NAME};

        ssl_certificate /etc/nginx/certs/server.crt;
        ssl_certificate_key /etc/nginx/certs/server.key;
        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_ciphers ECDHE-RSA-AES256-GCM-SHA512:DHE-RSA-AES256-GCM-SHA512:ECDHE-RSA-AES256-GCM-SHA384;
        ssl_prefer_server_ciphers on;
        ssl_session_cache shared:SSL:10m;
        ssl_session_timeout 10m;
        add_header Strict-Transport-Security "max-age=63072000; includeSubDomains";

        location / {
            proxy_pass http://guacamole/guacamole/;
            proxy_buffering off;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection $http_connection;
            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;
            proxy_set_header X-Forwarded-Host $host;
            proxy_set_header X-Forwarded-Port $server_port;
            proxy_cookie_path /guacamole/ /;
        }
    }
}