Build a casino website - Steam

I want to build an online casino, HTML based slots and other games, maybe blackjack and so for CSGO skin betting. PLEASE if you don't know how steam and csgo skins works, don't waste any time. I want a system that enables you to deposit an amount of skins, and based on their values you get credits. Those credits can be used in the casino, after that the player can request items that we have on the website for cashout. An example is csgoskins.net. I might be able to supply you with a few HTML slots and so on, but you need to setup the database and the bots to automatically trade with players.