You may notice that there is 2 dota maps, dota_fixed and dota.vmap. You can choose one of these for it to be the map for players to play in.
What's the difference?
You might notice that at your first build, the minimap is just grey or blank. There's an easy way to fix that. Before building the map, tick the "Create new minimap on load" and build. Once you've built the map and the minimap is still blank, click "Run (Skip Build)" again and it will fix itself.
Feel free to contribute as well! Just dm Snoresville#2486 @ Discord