Resource Packs

So a few days ago my friend wanted to make a mingame server using this, but he said he needed a resource pack & I had to tell him there were no resource packs for Aternos. Can you add resource packs I wouldn't mine one for my server. Other than that Aternos is great i love it

No he wants the people who join his server to get a message that they should install the resource pack that he chooses, like on mineplex if you join Wizards or MineStrike.