docs(README): add info

Author: thomasleplus

README.md

@@ -5,3 +5,19 @@ To view each bookmarklet source code, you can browse the [javascripts](/javascri
 There is also a [user-friendly](https://thomasleplus.github.io/bookmarklets) version of this repository in the form of a GitHub Pages site.
 
 Feel free to open issues or pull requets for [bugs](https://github.com/thomasleplus/bookmarklets/issues/new?template=bookmarklet-bug-report.md) or [feature requests](https://github.com/thomasleplus/bookmarklets/issues/new?template=bookmarklet-feature-request.md).
+
+## Contributing
+
+Please read [CONTRIBUTING.md](CONTRIBUTING.md) for details on our code of conduct and the process for submitting pull requests.
+
+## Security
+
+Please read [SECURITY.md](SECURITY.md) for details on our security policy and how to report security vulnerabilities.
+
+## Code of Conduct
+
+Please read [CODE_OF_CONDUCT.md](CODE_OF_CONDUCT.md) for details on our code of conduct.
+
+## License
+
+This project is licensed under the terms of the [LICENSE](LICENSE) file.