Some advices on the guideline

[jackykwandesign]

Your article is great to introduce basic concept of CQRS ES
However, i think most of the people are actually confused on following topics:

1. How to persistence data and query from it
2. How to replay events to restore the persistence e.g. DB
3. How to handle command failure
4. How to handle persisting error
5. How to work with domain more than 1 entity, e.g. Booking service that need to check existing records

Also, the detail of event Store should be added. Cause it will never work without the store.
E.g. Setup of Event Store by Docker
https://developers.eventstore.com/server/v5/server/installation/docker.html#run-with-docker