Update RIT DOCKER GENERATE COMPOSE formula README

[GuillaumeFalourd]

What would you like ?

• I would the RIT DOCKER GENERATE COMPOSE formula to have a complete README file explaining what the formula does, with an example of its execution (GIF).

• Formula : https://github.com/ZupIT/ritchie-formulas/tree/master/docker/generate/compose

Why is this needed ?

• With the Ritchie Portal (ongoing) those READMEs will be used to share formulas information with the community, and the better they are, the easiest it will be for the community to use them.

Examples

• https://github.com/ZupIT/ritchie-formulas-demo/tree/master/demo/hello-world
• https://github.com/ZupIT/ritchie-formulas/tree/master/github/publish/repo

[isaiastavares]

@GuillaumeFalourd can assign this issue to me, pls ?

[isaiastavares]

I already created the PR #293