Phpmyadmin – Dockerized .net 8 app doesn't expose port correctly

I’m trying to dockerize a dotnet 8 web api project.
I’m on Windows 10 with Docker Desktop installed.

This is the Dockerfile I’m using

FROM mcr.microsoft.com/dotnet/aspnet:8.0 

WORKDIR /app

# Copy the built application from the build image
COPY ./bin/Release/net8.0/ /app

# Expose the port the app will run on
EXPOSE 5000

# Set the environment variable for ASP.NET Core
ENV ASPNETCORE_URLS=http://+:5000

# Set the entry point for the application
ENTRYPOINT ["dotnet", "Finch.Agents.dll"]

This is the launchSettings.json:

{
  "$schema": "https://json.schemastore.org/launchsettings.json",
  "iisSettings": {
    "windowsAuthentication": false,
    "anonymousAuthentication": true,
    "iisExpress": {
      "applicationUrl": "http://localhost:60197",
      "sslPort": 44302
    }
  },
  "profiles": {
    "http": {
      "commandName": "Project",
      "dotnetRunMessages": true,
      "launchBrowser": true,
      "launchUrl": "swagger",
      "applicationUrl": "http://localhost:5000",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },
    "https": {
      "commandName": "Project",
      "dotnetRunMessages": true,
      "launchBrowser": true,
      "launchUrl": "swagger",
      "applicationUrl": "https://localhost:7120;http://localhost:5000",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "launchUrl": "swagger",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    }
  }
}

And this the docker-compose.yml part with which I run the container

  finch-agent:
    image: finch-agent:1.0.0
    container_name: finch-agent
    ports:
      - "8081:5000"

Below is the docker logs ...

---------------------------------------------
.... my logs ...
---------------------------------------------
warn: Microsoft.AspNetCore.Hosting.Diagnostics[15]
      Overriding HTTP_PORTS '8080' and HTTPS_PORTS ''. Binding to values defined by URLS instead 'http://+:5000'.
info: Microsoft.Hosting.Lifetime[14]
      Now listening on: http://[::]:5000
info: Microsoft.Hosting.Lifetime[0]
      Application started. Press Ctrl+C to shut down.
info: Microsoft.Hosting.Lifetime[0]
      Hosting environment: Production
info: Microsoft.Hosting.Lifetime[0]
      Content root path: /app

between the ----- lines appears some custom log messages I printed, so I’m sure the application is running.
Besides, it seems that the application is correctly listening on port 80.

Why, then, if I open the browser at http://localhost:8081/swagger I get a 404 ERROR? (I also get the same error at http://localhost:8081/)

PS: ‘m also sure that the application works correcly when running with dotnet run, not dockerized.

edit:

additional information: Following thepip3r comments, I add the following information:

results of netstat -anop

Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name     Timer
tcp        0      0 127.0.0.11:35509        0.0.0.0:*               LISTEN      -                    off (0.00/0/0)
tcp6       0      0 :::5000                 :::*                    LISTEN      1/dotnet             off (0.00/0/0)
udp        0      0 127.0.0.11:38653        0.0.0.0:*                           -                    off (0.00/0/0)
Active UNIX domain sockets (servers and established)
Proto RefCnt Flags       Type       State         I-Node   PID/Program name     Path
unix  2      [ ACC ]     STREAM     LISTENING     47244    1/dotnet             /tmp/dotnet-diagnostic-1-156353-socket

Concerning general and security settings for Docker Desktop, I can add that other containers exposing web apps (not dotnet, eg. I’ve got a phpmyadmin container running witht he same docker-compsoe), work correctly.