fix: don't delete server dir on cleanup if not empty

Part of coop-cloud/organising#325.

pkg/config/env.go

@@ -66,8 +66,8 @@ func ReadServerNames() ([]string, error) {
 	return serverNames, nil
 }
 
-// getAllFilesInDirectory returns filenames of all files in directory
-func getAllFilesInDirectory(directory string) ([]fs.FileInfo, error) {
+// GetAllFilesInDirectory returns filenames of all files in directory
+func GetAllFilesInDirectory(directory string) ([]fs.FileInfo, error) {
 	var realFiles []fs.FileInfo
 
 	files, err := ioutil.ReadDir(directory)