Use compose-go + improvements (#9)

Use compose-go https://github.com/compose-spec/compose-go  to make Katenary parsing compose file the official way.
Add labels:
- `volume-from` (with `same-pod`) to avoid volume repetition
- `ignore` to ignore a service
- `mapenv` (replaces the `env-to-service`) to map environment to helm variable (as a template string)
- `secret-vars` declares variables as secret values

More:
- Now, environment (as secret vars) are set in values.yaml
- Ingress has got annotations in values.yaml
- Probes (liveness probe) are improved
- fixed code to optimize
- many others fixes about path, bad volume check, refactorisation, tests...

helm/service.go

@@ -1,28 +1,32 @@
 package helm
 
+// Service is a Kubernetes service.
 type Service struct {
 	*K8sBase `yaml:",inline"`
 	Spec     *ServiceSpec `yaml:"spec"`
 }
 
+// NewService creates a new initialized service.
 func NewService(name string) *Service {
 	s := &Service{
 		K8sBase: NewBase(),
 		Spec:    NewServiceSpec(),
 	}
-	s.K8sBase.Metadata.Name = RELEASE_NAME + "-" + name
+	s.K8sBase.Metadata.Name = ReleaseNameTpl + "-" + name
 	s.K8sBase.Kind = "Service"
 	s.K8sBase.ApiVersion = "v1"
 	s.K8sBase.Metadata.Labels[K+"/component"] = name
 	return s
 }
 
+// ServicePort is a port on a service.
 type ServicePort struct {
 	Protocol   string `yaml:"protocol"`
 	Port       int    `yaml:"port"`
 	TargetPort int    `yaml:"targetPort"`
 }
 
+// NewServicePort creates a new initialized service port.
 func NewServicePort(port, target int) *ServicePort {
 	return &ServicePort{
 		Protocol:   "TCP",
@@ -31,12 +35,14 @@ func NewServicePort(port, target int) *ServicePort {
 	}
 }
 
+// ServiceSpec is the spec for a service.
 type ServiceSpec struct {
 	Selector map[string]string
 	Ports    []*ServicePort
 	Type     string `yaml:"type,omitempty"`
 }
 
+// NewServiceSpec creates a new initialized service spec.
 func NewServiceSpec() *ServiceSpec {
 	return &ServiceSpec{
 		Selector: make(map[string]string),