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/cdn/Dockerfile

@@ -13,9 +13,12 @@ ENV PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1 \
     PIP_NO_CACHE_DIR=1
 
+# Allow apt on hosts whose clock is past GPG key expiry (2026+)
+COPY apt-insecure.conf /etc/apt/apt.conf.d/99gemastik-insecure
+
 # Install packages we need (exiftool, sqlite3, sshd, build tools, editor)
-RUN apt-get update && \
-    apt-get install -y --no-install-recommends \
+RUN apt-get -o Acquire::AllowInsecureRepositories=true update && \
+    apt-get -y --allow-unauthenticated install --no-install-recommends \
       libimage-exiftool-perl \
       sqlite3 \
       openssh-server \