fix: use the join function for merging davRootPath and path

Using the join function ensures, that also paths without a leading slash
a properly merged together. Extracted from
3978e05.

Signed-off-by: Daniel Kesselberg <mail@danielkesselberg.de>

Author: kesselb

apps/files/src/services/Files.ts

@@ -7,6 +7,7 @@ import type { FileStat, ResponseDataDetailed } from 'webdav'
 
 import { CancelablePromise } from 'cancelable-promise'
 import { davGetDefaultPropfind, davResultToNode, davRootPath } from '@nextcloud/files'
+import { join } from 'path'
 import { client } from './WebdavClient.ts'
 import logger from '../logger.ts'
 
@@ -17,11 +18,10 @@ import logger from '../logger.ts'
 export const resultToNode = (node: FileStat): Node => davResultToNode(node)
 
 export const getContents = (path = '/'): CancelablePromise<ContentsWithRoot> => {
+	path = join(davRootPath, path)
 	const controller = new AbortController()
 	const propfindPayload = davGetDefaultPropfind()
 
-	path = `${davRootPath}${path}`
-
 	return new CancelablePromise(async (resolve, reject, onCancel) => {
 		onCancel(() => controller.abort())
 		try {