added changelog

CHANGELOG.md

@@ -0,0 +1,23 @@
+# 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/).
+
+## [Unreleased]
+
+## 2021-06-19
+### Added
+- A changelog is now avaible.
+
+## 2021-06-18
+### Added
+- Original files were added to the repo.
+- Automatic notification of build-
+
+### Changed
+- Fixed some problems with the CI/CD to work properly.
+- Fixed some docker related build issues.
+- Fixed a problem in the Dockerfile, which resulted in a warning and delay in builds.
+
+### Removed
+- Unnecessary parts of the Telegram message have been removed.