How to use docker compose port command to find mapped ports

# Introduction

In this lab, you will learn how to use the `docker port` command to discover the public port mapped to a Docker service. We will begin by creating a simple service with port mapping using the `nginx` image.

Following the service creation, you will explore how to find the public port for the entire service, for a specific protocol, and for a particular container index within the service. This hands-on experience will equip you with the skills to programmatically identify exposed ports for your Docker containers.