fix: support empty ssh keys

cli/server/new.go

@@ -23,6 +23,10 @@ func newHetznerCloudVPS(c *cli.Context) error {
 	var sshKeysRaw []string
 	var sshKeys []*hcloud.SSHKey
 	for _, sshKey := range c.StringSlice("hetzner-ssh-keys") {
+		if sshKey == "" {
+			continue
+		}
+
 		sshKey, _, err := client.SSHKey.GetByName(c.Context, sshKey)
 		if err != nil {
 			return err
@@ -109,6 +113,9 @@ func newCapsulVPS(c *cli.Context) error {
 
 	var sshKeys []string
 	for _, sshKey := range c.StringSlice("capsul-ssh-keys") {
+		if sshKey == "" {
+			continue
+		}
 		sshKeys = append(sshKeys, sshKey)
 	}