The main idea is that it'd be a shelter with basic amenities so that people don't get destroyed if they spawn in at night or something. Some examples for what to include would be crafting supplies, early game tinkers (no smeltery), maybe some sort of solar powered furnace.
It could also be helpful to have some
very early game stuff from a few of the mods to give people an idea of which direction to take. Do keep in mind this building will be rather small, so we'll have to be mindful of what we're stuffing in it.
That being said, if someone were to start building an actual settlement with trading, more advanced setups, and what not near spawn I wouldn't be opposed to its existence. Though please do wait and/or get permission for where. Don't want some horrible monstrosity literally surrounding the spawn building on all sides
.