add changelog

Author: cenkalti

CHANGELOG.md

@@ -0,0 +1,15 @@
+# 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).
+
+## [2.0.0] - 2024-12-20
+
+### Changed
+
+- Change field names in the config.yaml file.
+  Previously, fields were parsed as lowercase strings. Now, they are dash-separated.
+  Example: "portbegin" becomes "port-begin".
+