The public west-life portal is hosted at https://portal.west-life.eu. You can integrate Virtual Folder functionality by these main strategies:
link/popup of west-life web page, see filepicker demo. The filepicker.html is hosted by your web site. The filepickercomponent.html is hosted by west-life. Continue with Select File or Dir from VF
integrate using WEBDAV protocol using the WEBDAV endpoint URL obtained by filepicker component. Continue with Working with WEBDAV.
embedding west-life component - the web page is hosted by your web site. It links to some functionality hosted by west-life which is projected to the web page. Continue with Embedding component
adding component - VF web component are maintained as open source, follow Adding component