add changelog

CHANGELOG.md

@@ -0,0 +1,25 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+### Added
+
+### Changed
+
+### Fixed
+
+
+## [v0.1.0]
+
+### Added
+
+- First release
+
+
+[Unreleased]: <https://github.com/stac-utils/stac-fastapi-elasticsearch/tree/v0.1.0...main>
+[v0.1.0]: <https://github.com/stac-utils/stac-fastapi-elasticsearch/tree/v0.1.0>