Here you can find the latest server build available for Space Station 14.

The latest build is from Friday, 29 September 2023 at 00:04 UTC. Pick whatever build suits the operating system you're trying to host on:

The version is 3477349dfebaba8c7b8d3c359b3c6f68c6d5012b

If you somehow ended up here without reading the Server Hosting Tutorial, go read that first. It tells you how to actually host a server.