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...

generator/writers/storage.go

@@ -2,23 +2,31 @@ package writers
 
 import (
 	"katenary/helm"
+	"log"
 	"os"
 	"path/filepath"
 
 	"gopkg.in/yaml.v3"
 )
 
+// BuildStorage writes the persistentVolumeClaim.
 func BuildStorage(storage *helm.Storage, name, templatesDir string) {
 	kind := "pvc"
 	name = storage.Metadata.Labels[helm.K+"/component"]
 	pvcname := storage.Metadata.Labels[helm.K+"/pvc-name"]
 	fname := filepath.Join(templatesDir, name+"-"+pvcname+"."+kind+".yaml")
-	fp, _ := os.Create(fname)
+	fp, err := os.Create(fname)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer fp.Close()
 	volname := storage.K8sBase.Metadata.Labels[helm.K+"/pvc-name"]
 
 	fp.WriteString("{{ if .Values." + name + ".persistence." + volname + ".enabled }}\n")
 	enc := yaml.NewEncoder(fp)
 	enc.SetIndent(IndentSize)
-	enc.Encode(storage)
+	if err := enc.Encode(storage); err != nil {
+		log.Fatal(err)
+	}
 	fp.WriteString("{{- end -}}")
 }