Installer: Refactor and give each searver its own directory

Change-Id: I1db2929e7a35b6f92022dec0c6506d68e0297563
diff --git a/core/installer/cmd/app_manager.go b/core/installer/cmd/app_manager.go
index 16ac83a..afc7d32 100644
--- a/core/installer/cmd/app_manager.go
+++ b/core/installer/cmd/app_manager.go
@@ -7,9 +7,9 @@
 	"golang.org/x/crypto/ssh"
 
 	"github.com/giolekva/pcloud/core/installer"
+	"github.com/giolekva/pcloud/core/installer/server/appmanager"
 	"github.com/giolekva/pcloud/core/installer/soft"
 	"github.com/giolekva/pcloud/core/installer/tasks"
-	"github.com/giolekva/pcloud/core/installer/welcome"
 
 	"github.com/go-git/go-billy/v5/memfs"
 	"github.com/spf13/cobra"
@@ -143,7 +143,7 @@
 	if err != nil {
 		return err
 	}
-	s, err := welcome.NewAppManagerServer(
+	s, err := appmanager.NewServer(
 		appManagerFlags.port,
 		repoIO,
 		m,