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64-bit (x86_64)\n- `electronstudio/ubuntu16-modern:i386` - 32-bit (x86)\n\n## Included Tools\n\n- **Node.js v20.18.1** - Modern JavaScript runtime (unofficial builds compatible with glibc 2.17)\n- **Git v2.47.1** - Latest Git version\n- **CMake v3.20.5** - Modern CMake build system\n- **OpenJDK 8** - Java development kit\n- **Multiple Python versions** - Python 3.13.6, 3.12.9, 3.11.13, 3.10.18 (compiled from source with optimizations)\n- **PyPy versions** - PyPy 3.10 v7.3.19, PyPy 3.11 v7.3.20 (high-performance Python implementations)\n- **SDL v2.32.8** - Static library for multimedia, games, and cross-platform development (compiled from source)\n- **Build essentials** - GCC, Make, and compilation tools\n- **Development libraries**:\n  - OpenGL (libgl1-mesa-dev, libglu1-mesa-dev)\n  - X11 (libx11-dev, libxrandr-dev, libxi-dev)\n  - Audio (libasound2-dev)\n  - Wayland (libwayland-dev)\n  - SSL (libssl-dev)\n  - And more...\n\n## Usage\n\n### In GitHub Actions\n\n```yaml\nname: Build\non: [push]\n\njobs:\n  build-64bit:\n    runs-on: ubuntu-latest\n    container: electronstudio/ubuntu16-modern:latest\n    steps:\n      - uses: actions/checkout@v4\n      - name: Build project\n        run: |\n          node --version\n          java -version\n          python3.13 --version\n          # Your build commands here\n\n  build-32bit:\n    runs-on: ubuntu-latest\n    container: electronstudio/ubuntu16-modern:i386\n    steps:\n      - uses: actions/checkout@v4\n      - name: Build project\n        run: |\n          node --version\n          java -version\n          python3.13 --version\n          # Your build commands here\n```\n\n### Local Development\n\n```bash\n# Run 64-bit container\ndocker run -it -v $(pwd):/workspace electronstudio/ubuntu16-modern:latest\n\n# Run 32-bit container\ndocker run -it -v $(pwd):/workspace electronstudio/ubuntu16-modern:i386\n\n# With X11 forwarding (for GUI applications)\ndocker run -it \\\n  -v /tmp/.X11-unix:/tmp/.X11-unix \\\n  -e DISPLAY=$DISPLAY \\\n  -v $(pwd):/workspace \\\n  electronstudio/ubuntu16-modern:latest\n```\n\n## Why Ubuntu 16.04?\n\nUbuntu 16.04 provides compatibility with older systems while still supporting modern build tools through:\n- PPAs for newer Git versions\n- Unofficial Node.js builds for newer JavaScript features\n- Kitware repositories for modern CMake\n- Backported development libraries\n\n## Building from Source\n\n```bash\n# Build 64-bit image\ndocker build -t ubuntu16-modern:latest .\n\n# Build 32-bit image\ndocker build --platform=linux/386 -f Dockerfile.i386 -t ubuntu16-modern:i386 .\n```\n\n## Differences Between Architectures\n\n| Feature | 64-bit | 32-bit |\n|---------|--------|--------|\n| Node.js | v20.18.1 | v20.18.1 |\n| Git | v2.47.1 | v2.47.1 |\n| CMake | v3.20.5 | v3.20.5 |\n| OpenJDK | 8 | 8 |\n| Python | 3.13.6, 3.12.9, 3.11.13, 3.10.18 | 3.13.6, 3.12.9, 3.11.13, 3.10.18 |\n| PyPy | 3.10 v7.3.19, 3.11 v7.3.20 | 3.10 v7.3.19, 3.11 v7.3.20 |\n| SDL | v2.32.8 | v2.32.8 |\n| All dev libraries | ✅ | ✅ |\n\n## License\n\nMIT License - see LICENSE file for details.\n\n## Contributing\n\n1. 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