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

Part of coop-cloud/organising#325.

pkg/config/app.go

@@ -203,7 +203,7 @@ func LoadAppFiles(servers ...string) (AppFiles, error) {
 
 	for _, server := range servers {
 		serverDir := path.Join(SERVERS_DIR, server)
-		files, err := getAllFilesInDirectory(serverDir)
+		files, err := GetAllFilesInDirectory(serverDir)
 		if err != nil {
 			return appFiles, fmt.Errorf("server %s doesn't exist? Run \"abra server ls\" to check", server)
 		}

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)