Fix problems and adding functionnalities

Many fixes and enhancements:

- Add icon option
- Add env file managment
- Ordering compose parsing options
- Fix path with underscores
- Fix image and tag discovery
- Better documentation for labels

generator/service.go

@@ -74,6 +74,11 @@ func (s *Service) AddPort(port types.ServicePortConfig, serviceName ...string) {
 	})
 }
 
+// Filename returns the filename of the service.
+func (s *Service) Filename() string {
+	return s.service.Name + ".service.yaml"
+}
+
 // Yaml returns the yaml representation of the service.
 func (s *Service) Yaml() ([]byte, error) {
 	y, err := yaml.Marshal(s)
@@ -88,8 +93,3 @@ func (s *Service) Yaml() ([]byte, error) {
 
 	return y, err
 }
-
-// Filename returns the filename of the service.
-func (s *Service) Filename() string {
-	return s.service.Name + ".service.yaml"
-}