Install
tar xvf postman-linux-x64.tar.xzpostman.desktop
# ~/.local/share/applications/postman.desktop
[Desktop Entry]
Type=Application
Name=Postman
Icon=/home/dgkim/Applications/Postman/app/resources/app/assets/icon.png
Exec=/home/dgkim/Applications/Postman/Postman
Categories=Development
Terminal=false