docs: updated changelog for v0.4.0

Author: luisaveiro

CHANGELOG.md

@@ -6,6 +6,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [v0.4.0] - 2022-10-11
+### Added
+- Docker Compose YAML file for Cassandra, DynamoDB Local & YugabyteDB.
+- Cassandra, DynamoDB Local & YugabyteDB environment variables to DotEnv example file.
+- Developer-friendly comments for environment variables in DotEnv example file.
+
+### Changed
+- Renamed Docker Compose files to follow compose specification.
+- Readme to adopt Compose V2 specifications.
+
 ## [v0.3.0] - 2022-09-16
 ### Added
 - Docker Compose YAML file for SurrealDB.