Another interesting QGIS Server Client from Italy to follow Lizmap, QWC2 & Gisquick. Looking forward to more. Introduced last year. https://g3wsuite.it/en/g3w-suite-publish-qgis-projects/
The humble 'shapefile' is still in use and is still one of the most popular formats for data exchange since the 1990's but the world has moved on and it's time to kill it off. Here is the good and bad of 'shapefiles'. Thanks to Jachym Cepicky http://switchfromshapefile.org/