Add CHANGELOG.md so mkdocs doesn't throw an error for file not found

Author: ijemmy

.gitignore

@@ -29,4 +29,7 @@ coverage
 .DS_Store
 
 # Visual Studio Code
-.vscode
+.vscode
+
+# Python virtual environments (for running mkdocs locally)
+venv

CHANGELOG.md

@@ -0,0 +1,16 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+This project follows [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) format for changes and adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+
+## [Unreleased]
+
+## 0.1.0
+
+### Features
+
+* **tracer:** beta release ([#91](https://github.com/awslabs/aws-lambda-powertools-python/issues/91))
+* **logger:** beta release ([#24](https://github.com/awslabs/aws-lambda-powertools-python/issues/24))
+* **metrics:** beta release ([#25](https://github.com/awslabs/aws-lambda-powertools-python/issues/25))

CONTRIBUTING.md

@@ -52,8 +52,10 @@ You might find useful to run both the documentation website and the API referenc
 
 * **API reference**: :construction:
 * **Docs website**:
-	- `docs-buildDockerImage` OR `docker build -t squidfunk/mkdocs-material ./docs/`
-  - `docs-runLocalDocker` OR `docker run --rm -it -p 8000:8000 -v ${PWD}:/docs squidfunk/mkdocs-material`
+
+You can build and start a local docs website by running these two commands.
+  - `npm run docs-buildDockerImage` OR `docker build -t squidfunk/mkdocs-material ./docs/`
+  - `npm run docs-runLocalDocker` OR `docker run --rm -it -p 8000:8000 -v ${PWD}:/docs squidfunk/mkdocs-material`
 
 ### Conventions