tools in all containers + apt GPG fix for 2026 clock + target dropdown fixed

- all 6 Dockerfiles: vim curl wget netcat git python3-pip now installed
- apt-insecure.conf (AllowInsecureRepositories) copied into images so
  participants can apt-get install despite expired Ubuntu/Debian GPG keys
- warmup base ubuntu:20.04 (EOL, GPG expired) -> ubuntu:24.04
- installed vim+git live into all 18 running team containers
- team portal target dropdown reloads after login (was empty pre-auth)
- attack log endpoint + A/D submit (attacker vs target) verified e2e

services/carbeat/Dockerfile

@@ -6,8 +6,11 @@ ARG PASSWORD=root
 ENV DEBIAN_FRONTEND=noninteractive
 WORKDIR /home/ctfuser/chall
 
-RUN apt-get update && \
-    apt-get install -y --no-install-recommends \
+# Allow apt on hosts whose clock is past GPG key expiry (2026+)
+COPY apt-insecure.conf /etc/apt/apt.conf.d/99gemastik-insecure
+
+RUN apt-get -o Acquire::AllowInsecureRepositories=true update && \
+    apt-get -y --allow-unauthenticated install --no-install-recommends \
       make \
       g++ \
       socat \
@@ -16,6 +19,10 @@ RUN apt-get update && \
       bash \
       nano \
       vim \
+      curl \
+      wget \
+      netcat-openbsd \
+      git \
     && rm -rf /var/lib/apt/lists/*
 
 RUN useradd -m -d /home/ctfuser -s /bin/bash ctfuser && echo "ctfuser:${PASSWORD}" | chpasswd