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/ingress.go

@@ -1,5 +1,6 @@
 package helm
 
+// Ingress is the kubernetes ingress object.
 type Ingress struct {
 	*K8sBase `yaml:",inline"`
 	Spec     IngressSpec
@@ -8,7 +9,7 @@ type Ingress struct {
 func NewIngress(name string) *Ingress {
 	i := &Ingress{}
 	i.K8sBase = NewBase()
-	i.K8sBase.Metadata.Name = RELEASE_NAME + "-" + name
+	i.K8sBase.Metadata.Name = ReleaseNameTpl + "-" + name
 	i.K8sBase.Kind = "Ingress"
 	i.ApiVersion = "networking.k8s.io/v1"
 	i.K8sBase.Metadata.Labels[K+"/component"] = name