I need a way to define an absolute path to the proxyUrl about aspnetcore.rendertron

[galamai]

Hi, the original idea of rendertron lies precisely in the availability of a real host for it, and the substitution violates this principle. In the simplest case, a solution with address redefinition will work. But substitution will create problems for CEO.
Case with a localhost address and containers known. You need to set the desired name for any external address of the container and everything will work. To do this, you need to make changes to the hosts file of your system.