File - Settings - Tools - External Tools - +
Set the name:
Webpack dev server
Tool settings:
Program: C:\Users\[userName]\AppData\Roaming\npm\webpack-dev-server.cmd
Parameters: --content-base [destinationFolder]
Example: --content-base dist
Working directory: $ProjectFileDir$
File - Settings - Keymap - External Tools - External Tools - Webpack dev server - Add shortcut -> Press "ALT + D"