Install Ctfreak Server on Ubuntu 22.04

install-ctfreak.sh

#!/bin/bash
## Install Ctfreak Server
## run as root
## https://ctfreak.com/
## https://ctfreak.com/docs/install/linux

FQDN=task.linuxpro.com.br
DOMAIN=linuxpro.com.br

apt-get update
apt-get install -y curl certbot nginx
systemctl stop nginx

useradd -U -M -s /bin/bash -d /opt/ctfreak ctfreak
mkdir -p /opt/ctfreak/.config
curl -o /opt/ctfreak/ctfreak -#L -k https://ctfreak.com/download/release/latest/linux/amd64
chmod +x /opt/ctfreak/ctfreak
chown -R ctfreak:ctfreak /opt/ctfreak

certbot certonly --standalone -d "$FQDN" --preferred-challenges http --agree-tos -n -m "linuxpro@$DOMAIN" --keep-until-expiring

cat <<'EOF' >/etc/nginx/sites-available/ctfreak.conf
server {
    listen 443 ssl; 
    server_name FQDN;
    access_log  /var/log/nginx/FQDN.access.log;

    ssl_certificate           /etc/letsencrypt/live/FQDN/fullchain.pem;
    ssl_certificate_key       /etc/letsencrypt/live/FQDN/privkey.pem;
    ssl on;
    ssl_session_cache  builtin:1000  shared:SSL:10m;
    ssl_protocols  TLSv1.2;


    location / {
        proxy_pass http://localhost:6700;
        proxy_set_header X-Forwarded-Host $host:$server_port;
        proxy_set_header X-Forwarded-Server $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
}

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

sed -i "s|FQDN|$FQDN|g" /etc/nginx/sites-available/ctfreak.conf
ln -s /etc/nginx/sites-available/ctfreak.conf /etc/nginx/sites-enabled/



cat <<'EOF' >/etc/systemd/system/ctfreak.service
[Unit]
Description=Run CtFreak server
After=network.target

[Service]
Type=simple
Restart=on-failure
WorkingDirectory=/opt/ctfreak
ExecStart=/opt/ctfreak/ctfreak run
User=ctfreak
Group=ctfreak
LimitNOFILE=100000
LimitNOFILESoft=100000

[Install]
WantedBy=multi-user.target
EOF

chmod 664 /etc/systemd/system/ctfreak.service
systemctl daemon-reload
systemctl enable ctfreak
systemctl start ctfreak

systemctl start nginx

## Navigate to https://$FQDN
## Log in with the default user: admin / password: ctfreak.