package.json

 "scripts": {
   "prod": "webpack --config webpack.config.prod.js --colors --mode production && .\\delfolder.bat && yarn deploy2",
   "deploy":"xcopy \"C:\\Users\\User\\Source\\Repos\\legends.static.github.io\\dist\" \"C:\\inetpub\\wwwroot\\afolder\" /S /Y",
   "deploy2":"robocopy \"C:\\Users\\User\\Source\\Repos\\legends.static.github.io\\dist\" \"C:\\inetpub\\wwwroot\\afolder\" /COPY:DATS /MOVE /PURGE /S",
 },


delfolder.bat in project root: (deletes all files/folders of a specified directory)

del /q "C:\inetpub\wwwroot\legends\*"
FOR /D %%p IN ("C:\inetpub\wwwroot\legends\*.*") DO rmdir "%%p" /s /q