Unable to bind to http://localhost:5000 on the IPv6 loopback interface: 'Cannot assign requested address'

Question

I am using asp.net core 3.1 docker enabled project template (VS2019) to develop a web API. There are no compilation errors.

While running the project, in the output

Answer 1

To workaround the issue, add the code ENV ASPNETCORE_URLS=http://+:80 below the other ENV declarations at the top of the Dockerfile.develop file

Dockerfile.develop after:

FROM mcr.microsoft.com/dotnet/core/sdk:3.1
ARG BUILD_CONFIGURATION=Debug
ENV ASPNETCORE_ENVIRONMENT=Development
ENV DOTNET_USE_POLLING_FILE_WATCHER=true  
ENV ASPNETCORE_URLS=http://+:80  
EXPOSE 80