Add change log

Signed-off-by: Jacob Kiers <code@kiers.eu>

CHANGELOG.md

@@ -0,0 +1,42 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.1.9] - 2024-06-22
+
+### Deprecated
+
+The ability to run `l4p` without arguments is now deprecated. Please use 
+`l4p serve` going forward.
+
+### Added
+
+* Added self update functionality. Just run `l4p update` to use it.
+* Now keeping a change log in the `CHANGELOG.md` file.
+
+### Changed
+
+* Updated build pipeline to generate much smaller binaries
+
+-------
+
+## Previous versions
+
+[unreleased]: https://code.kiers.eu/jjkiers/layer4-proxy/compare/v0.1.9...HEAD
+[0.1.9]: https://code.kiers.eu/jjkiers/layer4-proxy/compare/v0.1.8...v0.1.9
+
+
+
+Types of changes:
+
+* `Added` for new features.
+* `Changed` for changes in existing functionality.
+* `Deprecated` for soon-to-be removed features.
+* `Removed` for now removed features.
+* `Fixed` for any bug fixes.
+* `Security` in case of vulnerabilities.