NOTE: Technically this might still work, however, the dependencies haven't been updated in years and it's untested with current versions of QGIS.

Simple web server to host QGIS plugins.

You will have to supply your own plugins.xml which tells QGIS where to find packages. However qgisrv can serve these packages.

Per default all requests can be done unauthenticated. If you want authentication you can enable basic auth in the settings.