I use npm run build to build a next project. I get .next folder, but server.js and web.config – even if they are in project folderm are not added to the build folder. I copy these two files manually – without them I jst get a list of files in build folder when I deploy my build folder – . I also make sure that the iis has read/execute / read / and other acesses to build folder. Here are server.js and web.config that I add manually: