Do not search implicitly for a compose file

The user needs to explicitly give the path to the docker-compose file
that they want to base the app on.

Signed-off-by: Djordje Lukic <djordje.lukic@docker.com>

Author: rumpl

internal/packager/init.go

@@ -45,11 +45,6 @@ func Init(name string, composeFile string) (string, error) {
 		return "", err
 	}
 
-	if composeFile == "" {
-		if _, err := os.Stat(internal.ComposeFileName); err == nil {
-			composeFile = internal.ComposeFileName
-		}
-	}
 	if composeFile == "" {
 		err = initFromScratch(name)
 	} else {