Create CHANGELOG.md

CHANGELOG.md

+## [Unreleased]
+
+### Added
+
+- Use ALS for request-agnostic context injection
+- Add performance monitoring to queue jobs
+- Use queue for sending password reset emails
+
+## [v2.0.0-beta.1] - 2021 / 02 / 07 
+
+### Added
+
+- Queue worker and worker process
+- Helm chart
+- Task runner
+- Sentry performance monitoring
+
+### Changed
+
+- Refactored code to use new Hackerfest style server structure
\ No newline at end of file