So that’s the blog i wrote about it yes 
So the steps you do
1.
npx create-strapi-app@latest myproject --quickstart
This will create the project etc. Then stop it and make sure you are in the strapi directory myproject in this example
then run
2.
npx @strapi-community/dockerize
Answer the questions you might want “both” and docker-compose
And you are good to go.
Here is the github for the tool