Installing Spigot
You can install Spigot via our version downloader or by uploading the jar yourself.
Version Downloader
To install via the version downloader, select Spigot from the drop down and select the version you need.
Then just restart the server.
Installing Manually
Download the version you need from here: https://getspigot.net/ (opens in a new tab)
Upload the jar via the file manager.
Once uploaded, set the jar in the server overview page.