Server IP = minetest.org
Port = 30012
Recommended Build :
Windows: 64 bit Fess's leveldb build, https://disk.yandex.com/public/?hash=fO7f8YRaqhZyMzmuFrXorBDl%2BFLlalrj016VsBPHdUU%3D
32 bit https://forum.minetest.net/viewtopic.php?id=4547
Linux: https://launchpad.net/~minetestdevs/+ar%20...%20ily-builds
Now this is completely up to you if you use the recommended build or not, it does not affect the server at all.