Plain .NET 5 project runs in Docker but doesn't reacts to requests
It listens on port 80 in the container because Microsoft set the ASPNETCORE_URLS environment variable in their aspnet Docker images to http://+:80 which overrides your configuration.
To get it to listen on something else, you have to set the ASPNETCORE_URLS variable yourself in your Dockerfile.
To get it to listen on port 5000 and 5001 like you want, you need to add
ENV ASPNETCORE_URLS=http://+:5000;https://+:5001
to your Dockerfile
They set it in the runtime-deps image, which is the base for the runtime image, which is the base for the aspnet image. You can see it here: https://github.com/dotnet/dotnet-docker/blob/d8dc00685a45b7f534e9f68ded50667023ded151/src/runtime-deps/3.1/bullseye-slim/amd64/Dockerfile
why dotnet 5 docker container fail in run time?
Use this as your base image:
FROM mcr.microsoft.com/dotnet/aspnet:5.0.0-buster-slim AS base
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