This project demonestarte simple Api GateWay using Ocelot in .Net Core 5. There was a good example in c-sharpcorner but it was out of date.
This example fully work in development and contianerized environment. I Used "UseIIS" in development and "UseKestrel" in contianerized environment while starting program at APIGateWay/Program/Main.
I hope you enjoy.