Resource cpus value has wrong type when calling MarshalYAML export

[donknap]

Original Yaml :

services:
  nginx_proxy:
    image: nginx:latest
    deploy:
      resources:
        limits:
          cpus: 4.00
          memory: 500M

code:

// make 
overrideYaml, err := compose.Project.MarshalYAML()
if err != nil {
return nil, err
}

error:

[ndeloof]

cpus is defined in compose spec schema as a number, which indeed can be set as a float but this doesn't mean the notation MUST be decimal. A plain integer is a valid value

[ndeloof]

see go-yaml/yaml#430
A possible workaround is to define a custom marshaller:

func (u NanoCPUs) MarshalYAML() (interface{}, error) {
	return yaml.Node{Kind: yaml.ScalarNode, Tag: "!!float", Value: fmt.Sprintf("%f", u)}, nil
}

still, this is not strictly necessary to conform to yaml

Could you please clarify the usage that requires marshaled model to use a floating point notation?