feat: challenge registry-driven platform + XVI/XVII imports + admin toggle + domain rename

- Rename repo/domain: attack-defense-platform / attackdefense.imrnes.team (all refs replaced)
- challenge_registry.json: single source of truth (28 challs across gemastik18/xvi/xvii)
- teams.py: registry-driven CHALLENGES, set_challenge_enabled, sync_challenge_runtime
  (apply enable/disable to live teams: build/up or stop/remove + receiver restart)
- compose_gen.py: render per-team compose from canonical per-challenge templates
  (image reuse, per-team ports 30xxx, flag mounts, passwords)
- gen_canonical_composes.py: canonical docker-compose.yml for all services
- import_new_challenges.py: import XVI/XVII services + EOL base image fixes
  (debian:buster→bookworm, node:14→20, python:3.7-slim→3.11)
- receiver: xvi package (10 checkers) + xvii package (12 generic checkers),
  Challenge base reads PASSWORD_<team_port> from env; gen_receiver_main.py
  generates per-team main.py from registry
- main.py: /api/challenges returns full registry; PATCH /api/challenges/<name>
  toggles enabled + applies to live teams
- index.html: 🏗️ Challenge Manager tab (toggle per challenge, grouped by set)
- SLA bonus now dynamic (all enabled challenges, not hardcoded 6)

services/back-to-basic/Dockerfile

@@ -0,0 +1,30 @@
+FROM ubuntu:24.04
+
+ARG PASSWORD
+
+ENV DEBIAN_FRONTEND noninteractive
+
+RUN echo root:${PASSWORD} | chpasswd
+COPY apt-insecure.conf /etc/apt/apt.conf.d/99gemastik-insecure
+RUN apt-get -o Acquire::AllowInsecureRepositories=true update && apt-get install -y openssh-server lib32z1 xinetd cmake gcc curl
+RUN echo "PasswordAuthentication yes" >> /etc/ssh/sshd_config
+RUN echo "PermitRootLogin yes" >> /etc/ssh/sshd_config
+RUN service ssh start
+
+RUN useradd -m ctf
+
+WORKDIR /ctf
+
+RUN echo "Connection blocked" > /etc/banner_fail
+COPY ctf.xinetd /etc/xinetd.d/ctf
+COPY ./src/main.c ./
+COPY ./start.sh ./
+RUN gcc /ctf/main.c -no-pie -fno-stack-protector -Wl,-z,relro,-z,now -o /ctf/main
+RUN touch /flag.txt
+RUN chmod -R 755 /ctf
+RUN chmod +x /ctf/start.sh
+
+ENTRYPOINT []
+CMD ["/usr/sbin/xinetd", "-dontfork"]
+
+EXPOSE 8000

services/back-to-basic/apt-insecure.conf

@@ -0,0 +1,3 @@
+Acquire::AllowInsecureRepositories "true";
+Acquire::AllowDowngradeToInsecureRepositories "true";
+Apt::Get::AllowUnauthenticated "true";

services/back-to-basic/ctf.xinetd

@@ -0,0 +1,18 @@
+service ctf
+{
+    disable = no
+    socket_type = stream
+    protocol    = tcp
+    wait        = no
+    user        = root
+    type        = UNLISTED
+    port        = 8000
+    bind        = 0.0.0.0
+    server      = /bin/sh
+    server_args = /ctf/start.sh
+    banner_fail = /etc/banner_fail
+    # safety options
+    per_source  = 10 # the maximum instances of this service per source IP address
+    rlimit_cpu  = 1 # the maximum number of CPU seconds that the service may use
+    #rlimit_as  = 1024M # the Address Space resource limit for the service
+}

services/back-to-basic/docker-compose.yml

@@ -0,0 +1,18 @@
+services:
+  back-to-basic:
+    container_name: back-to-basic_container
+    hostname: back-to-basic
+    restart: always
+    build:
+      context: .
+      args:
+        - PASSWORD=$PASSWORD_22000
+    volumes:
+      - ../receiver/flags/back-to-basic.txt:/flag.txt:ro
+      - ../utils/bashrc:/root/.bashrc:ro
+      - ../utils/preexec.sh:/root/.preexec.sh:ro
+    ports:
+      - "22000:8000"
+      - "22022:22"
+    extra_hosts:
+      - "host.docker.internal:host-gateway"

services/back-to-basic/src/main.c

@@ -0,0 +1,15 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+void give_me_idea() {
+  char buf[64];
+  puts("Do you have a good idea?");
+  fgets(buf, 200, stdin);
+}
+
+void main() {
+  setbuf(stdout, NULL);
+  give_me_idea();
+  puts("hmm... I'm also think the same thing...");
+  return 0;
+}

services/back-to-basic/start.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+/usr/sbin/sshd -D &
+su ctf -c "/ctf/main"