[Develop and manual Test] API endpoint (get) /api/v1/workspace/:fileId?

[Develop and manual Test] API endpoint (get) /api/v1/workspace/:fileId?
workspaceの情報一覧を返す。

{
    status: 'success' of 'error',
    info: {object} successのとき、workspaceの情報
    message: {string} errorのときは、その詳細
}
 On branch master
 Changes to be committed:
	modified:   server/api/v1/fileUpload/index.js
	modified:   server/api/v1/workspace/index.js
	modified:   server/app.js
	modified:   server/class/DB.js