Feat json schema

[roytev]

what

• Added a json schema for the charts values
• Added missing customizations to the values.yaml
• Added missing customizations to the Readme.md table

why

• make sure that if we change something in the values yaml we are not breaking something.
• when user install or upgrade it gets more verbose information if he put something wrong in the values.
• also when user make typo the additionalproperties:false will let him know that the attribute is not supported.
• when using intelliJ and i presume other IDE's its much easier to make changes as we are seeing the description from the schema.
• its a preparation of an effort of mine to make this chart more robust and maintainable. i also want to add helm unit tests

tests

• ran helm lint with all possible values.yaml attribute

references

• https://www.arthurkoziel.com/validate-helm-chart-values-with-json-schemas/
• https://austindewey.com/2020/06/13/helm-tricks-input-validation-with-values-schema-json/
• https://helm.sh/docs/topics/charts/#schema-files

[jamengual]

could you bump the version please?

[roytev]

@jamengual Thanks done!

[GMartinez-Sisti]

Thanks for the PR @roytev! Left some comments/suggestions.

[roytev]

@GMartinez-Sisti Thanks! ive made the requested changes

[GMartinez-Sisti]

LGTM 😄