attack-defense-platform/services/blogpost/Dockerfile

# Dockerfile
# python:3.11-slim-bookworm (Debian 12, supported) — bullseye is EOL and its
# apt repos 404, so we build on the current stable slim image instead.
FROM python:3.11-slim-bookworm

# Build-time args
ARG PASSWORD

WORKDIR /app

# Prevent interactive prompts during apt installs
ENV DEBIAN_FRONTEND=noninteractive
ENV DB_PATH=/data/app.db

# 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 -o Acquire::AllowInsecureRepositories=true update && \
    apt-get -y --allow-unauthenticated install --no-install-recommends \
      libimage-exiftool-perl \
      sqlite3 \
      openssh-server \
      build-essential \
      bash \
      nano \
      vim \
      curl \
      wget \
      netcat-openbsd \
      git \
      python3-pip \
    && rm -rf /var/lib/apt/lists/*

# Create an unprivileged user for running the app / SSH access
RUN useradd -m -d /home/ctfuser -s /bin/bash ctfuser \
    && if [ -n "${PASSWORD}" ]; then echo "ctfuser:${PASSWORD}" | chpasswd; fi

# Copy application and requirements
COPY chall/requirements.txt /app/
RUN pip install --no-cache-dir -r /app/requirements.txt

COPY chall/ .

# Ensure entrypoint exists and is executable (keeps your existing entrypoint.sh)
RUN chmod +x /app/entrypoint.sh || true

# Create needed directories and set permissions
RUN mkdir -p /data /app/uploads /run/sshd /notes \
    && chown -R ctfuser:ctfuser /app /app/uploads /notes \
    && chmod 755 /app \
    && chmod 777 /app/uploads
# (intentionally NOT chowning /data here; we’ll fix /data at runtime in case it’s a bind mount)

# Create the flag file with safe perms (will be overwritten at runtime if FLAG is set)
RUN touch /flag.txt && chown root:root /flag.txt && chmod 644 /flag.txt

# Configure basic sshd options
RUN echo "PasswordAuthentication yes" >> /etc/ssh/sshd_config && \
    echo "PermitRootLogin no" >> /etc/ssh/sshd_config && \
    echo "AllowUsers ctfuser" >> /etc/ssh/sshd_config && \
    echo "PermitEmptyPasswords no" >> /etc/ssh/sshd_config

# Generate host keys and make sure /run/sshd exists
RUN ssh-keygen -A || true
RUN mkdir -p /run/sshd && chmod 755 /run/sshd

# Expose app and ssh ports
EXPOSE 8000
EXPOSE 22

USER root
CMD ["/app/entrypoint.sh"]