Update images used for building containers and code test/lint, fill CHANGELOG.

CHANGELOG.md

@@ -1,12 +1,69 @@
 # Changelog
 
-``[A]`` - added
-``[F]`` - fixed
-``[R]`` - removed
+All notable changes to this project will be documented in this file.
 
----
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## 0.1.0
+## [Unreleased]
+
+### Changed
+
+* Updated docker images - golang to 1.19 and golangci-lint to 1.48.0.
+* Updated chroma to v2.2.0.
+
+## [0.4.0] - 2021-01-09
+
+### Added
+
+* PostgreSQL support.
+* Docker containerization for every commit and tag.
+* Pastes cleanup procedure.
+
+### Changed
+
+* Updated bulma to v 0.7.5.
+
+### Fixed
+
+* Dirty hack to get database connection reestablish (for sure).
+
+## 0.3.0
+
+Release changelogs lost :(.
+
+## [0.2.0] - 2018-05-27
+
+### Added
+
+* Possibility to create different database backends. Currently `mysql` and `flatfiles` are available.
+
+### Changed
+
+* De-hardcoded pagination configuration, it is now configurable via configuration file.
+
+## [0.1.1] - 2018-05-26
+
+### Added
+
+* Footer copyrights.
+
+### Changed
+
+* Refactored templates: now they're included in each other if neccessary.
+
+### Fixed
+
+* Fixed nasty bugs with private pastes that causing fastpastebin to crash.
+* Logger level from configuration now properly set.
+
+## [0.1.0] - 2018-05-19
 
 First normal release. Fast Paste Bin is able to handle public, private
-and passworded pastes.
+and passworded pastes.
+
+[Unreleased]: https://code.pztrn.name/apps/fastpastebin/compare/0.4.0...HEAD
+[0.4.0]: https://code.pztrn.name/apps/fastpastebin/compare/v0.2.0...0.4.0
+[0.2.0]: https://code.pztrn.name/apps/fastpastebin/compare/v0.1.1...v0.2.0
+[0.1.1]: https://code.pztrn.name/apps/fastpastebin/compare/v0.1.0...v0.1.1
+[0.1.0]: https://code.pztrn.name/apps/fastpastebin/src/tag/v0.1.0