.NET Core 3, Docker and Eureka Service Discovery setup

How to setup .NET Core Web API running from a Docker container to work with a Service Discovery with Eureka?

This is my current configuration that is not working:

Startup.cs

appsettings.json

• Option 1: Using localhost as hostname

• Option 2: Using host docker internal

Also in eureka.client.serviceUrl I've used those other options:

• http://localhost:8761/eureka/
• http://localhost:8761/eureka
• http://localhost:8761/
• http://localhost:8761

At the final, there is nothing registered in Eureka:

This is my first time working with something like this, so I followed all the steps in this tutorial