How to set spawnpoint?

I don't know the command to set our spawn in Minecraft 1.12.1.

Is it /set spawn? I honestly can't figure it out. Thanks!

It’s /spawnpoint per player or /setworldspawn for the world.

References:

1. https://minecraft.gamepedia.com/Commands/setworldspawn
2. https://minecraft.gamepedia.com/Commands/spawnpoint
3. https://minecraft.gamepedia.com/Commands

If it is a map or a server do /setworldspawn <cordinates> to set where you first spawn in when you haven't played yet. Like this: /setworldspawn 0 0 0.

If it is just where you spawn when you die, do /setspawn <cordinates>. Like this: /setspawn 0 0 0.

Or you can just do /time to set night and use a bed.