Rules:
*You can teleport into and out of it at will
*It has a couple of plug sockets and can connect to internet from the region you teleported in from
*You can take objects and people with you
*As already stated, it is (3m)^3 (3m*3m*3m). The walls are plain plaster with a light in the middle of the ceiling. The pocket dimension is topologically toroidal, so if there weren’t walls and a ceiling/floor (which you can actually destroy) you would loop if you went more than 3m in any direction. Gravity, then, is artificial and can be altered to anywhere from 0 to 2g from a dial on the wall.
Edit: additional specifications
*You can only teleport out to where you teleported in from.
*Time proceeds at the same rate inside the pocket dimension
*There is an eject button for those inside to get out if something happens to you
Well if that’s the case, is it even oxygenated in the first place? Even if it is, if there is no venting you would eventually either deplete oxygen or saturate with C02.
They said you could bring things in so I suppose you could bring the air with you.
After a quick googling it looks like the average person breathes 20-30 cubic meters of air a day.
But a server wouldn’t care about oxygen in the air just the heat.