docs: updated changelog for v0.1.1

Author: luisaveiro

CHANGELOG.md

@@ -6,6 +6,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [v0.1.1] - 2021-01-15
+### Added
+- EditorConfig file.
+
+### Changed
+- shell scripts to adopt [Google Shell Style Guide](https://google.github.io/styleguide/shellguide.html).
+- shell scripts based on [ShellCheck](https://github.com/koalaman/shellcheck) syntax guidelines.
+
 ## [v0.1.0] - 2021-01-09
 ### Added
 - Docker Compose YAML file.