Update input flag README file (#868)

* add stadin validation with docker

Signed-off-by: GuillaumeFalourd <guillaume.falourd@zup.com.br>

* Update code style

* Update code style bis

* Refactor

* merge master

* add INPUT FLAG command to README file template

Signed-off-by: GuillaumeFalourd <guillaume.falourd@zup.com.br>

* Update README.md

README.md

@@ -47,7 +47,8 @@ rit init
 To access the ["hello-world" formula]((https://github.com/ZupIT/ritchie-formulas-demo/tree/master/demo/hello-world)), you'll need to add the [ritchie-formulas-demo](https://github.com/ZupIT/ritchie-formulas-demo) repository locally. To do so, you can use the `rit add repo` command, or execute the command line below:
 
 ```bash
-echo '{"provider":"Github", "name":"demo", "url":"https://github.com/ZupIT/ritchie-formulas-demo", "priority":1}' | rit add repo --stdin
+rit add repo --provider="Github" --name="demo" --repoUrl="https://github.com/ZupIT/ritchie-formulas-demo" --priority=1
+
 ```
 
 Then, you'll be able to execute the "hello-world" formula through the command line below: