docs: Update README with version compatibility matrix

- Add version support table to README
- Link to VERSION_SUPPORT.md for detailed policies
- Add minimum requirements documentation
- Update license to GPL-3.0-or-later
- Add links to key documentation and contributing info

README.md

@@ -1,7 +1,20 @@
 bind9
 =====
 
-A feature-complete ansible role for installing and configuring bind9. The purpose of this role is to fully template out the entire official bind9 configuration file format. 
+A feature-complete ansible role for installing and configuring bind9. The purpose of this role is to fully template out the entire official bind9 configuration file format.
+
+## Version Compatibility
+
+| BIND9 Version | Role Branch | Status | Supported Platforms |
+|---------------|-------------|--------|---------------------|
+| 9.18.x (LTS) | `main` | ✅ Supported | Debian 11-13, Ubuntu 20.04-24.04 |
+| 9.20.x+ | `9.20` | 🚧 Planned | Debian 12-13, Ubuntu 22.04-24.04 |
+
+For detailed version support policy, branching strategy, and migration guidance, see [docs/VERSION_SUPPORT.md](docs/VERSION_SUPPORT.md).
+
+**Minimum Requirements:**
+- Ansible: 2.13+
+- Python: 3.8+ 
 
 What the role does:
 - Fully configures named.conf
@@ -195,10 +208,30 @@ Simple sample config of a recursive BIND server that allows your localnetwork to
               allow-recursion:
                 - mylan
 
+## Documentation
+
+- **[Configuration Grammar Reference](CONFIGURATION_GRAMMAR.md)**: Comprehensive guide to all BIND9 configuration options
+- **[Version Support Policy](docs/VERSION_SUPPORT.md)**: Supported versions, branching strategy, and release management
+- **[Changelog](CHANGELOG.md)**: Version history and upgrade notes
+
+## Contributing
+
+Contributions are welcome! Please see [docs/VERSION_SUPPORT.md](docs/VERSION_SUPPORT.md) for:
+- Branching strategy
+- Testing requirements
+- Backporting policies
+- Release procedures
+
+## Links
+
+- **Repository**: https://git.valid.dk/daniel/ansible-bind9-role
+- **Issues**: https://git.valid.dk/daniel/ansible-bind9-role/issues
+- **BIND9 Documentation**: https://bind9.readthedocs.io/
+
 License
 -------
 
-BSD
+GPL-3.0-or-later
 
 Author Information
 ------------------