chore(storage): common sorting for all servers

internal/provider/nordvpn/updater/servers.go

@@ -7,6 +7,7 @@ import (
 	"errors"
 	"fmt"
 	"net"
+	"sort"
 
 	"github.com/qdm12/gluetun/internal/constants/vpn"
 	"github.com/qdm12/gluetun/internal/models"
@@ -60,7 +61,7 @@ func (u *Updater) GetServers(ctx context.Context, minServers int) (
 			common.ErrNotEnoughServers, len(servers), minServers)
 	}
 
-	sortServers(servers)
+	sort.Sort(models.SortableServers(servers))
 
 	return servers, nil
 }

internal/provider/nordvpn/updater/sort.go

@@ -1,16 +0,0 @@
-package nordvpn
-
-import (
-	"sort"
-
-	"github.com/qdm12/gluetun/internal/models"
-)
-
-func sortServers(servers []models.Server) {
-	sort.Slice(servers, func(i, j int) bool {
-		if servers[i].Region == servers[j].Region {
-			return servers[i].Number < servers[j].Number
-		}
-		return servers[i].Region < servers[j].Region
-	})
-}