chore: add changelog

CHANGELOG.md

@@ -0,0 +1,26 @@
+# Changelog
+
+All notable changes to casper-js-sdk.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+<!--
+  Please follow below structures.
+  ## [1.1.1] - 2023-03-05
+  ### Added
+  ### Fixed
+  ### Changed
+  ### Removed
+ -->
+
+## [Unreleased]
+
+## [0.0.1] - 2023-7-12
+
+Initial version of `casper-node-launcher-js`.
+
+### Added
+
+- Started to use CHANGELOG.
+
+[0.0.1]: https://github.com/casper-network/casper-node-launcher-js/compare/0.0.1...main