content: # Ubuntu test environment for ColumbaEngine installation
  FROM ubuntu:22.04
  
  # Avoid interactive prompts during package installation
  ENV DEBIAN_FRONTEND=noninteractive
  ENV TZ=UTC
  
  # Install minimal dependencies for testing (not ColumbaEngine deps - let script install them)
  RUN apt-get update && apt-get install -y \
      curl \
      wget \
      sudo \
      ca-certificates \
      && rm -rf /var/lib/apt/lists/*
  
  # Create a test user with sudo privileges
  RUN useradd -m -s /bin/bash tester && \
      usermod -aG sudo tester && \
      echo 'tester ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers
  
  # Switch to test user
  USER tester
  WORKDIR /home/tester
  
  # Set environment variables for testing
  ENV ColumbaEngine_REPO=https://github.com/Gallasko/ColumbaEngine.git
  ENV INSTALL_PREFIX=/usr/local
  ENV BUILD_JOBS=2
  
  # Copy test scripts (will be mounted from host)
  # COPY --chown=tester:tester install-ColumbaEngine.sh .
  # COPY --chown=tester:tester install-emscripten.sh .
  # COPY --chown=tester:tester validate-installation.sh .
  
  # Default command
  CMD ["/bin/bash"]