Provide an official JMeter container image in Docker Hub

**dlresende** ([Bug 62963](https://bz.apache.org/bugzilla//show_bug.cgi?id=62963&redirect=false)):
Very often teams need to use JMeter deployed inside containers in order to perform tests, simulations, experiments, etc.

Today, there's no official JMeter container in https://hub.docker.com/r/apache/ provided by the JMeter team.

This enhancement is to suggest there's a strong case for the JMeter team to provide an official JMeter container in Docker Hub. This will help many teams running JMeter in containers to easily download an official image and start working. Today teams need to either build and maintain their own containers (which intrudoces extra burden) or use unknown third party containers available in Docker Hub (mainly not maintained or unreliable).

Votes in Bugzilla: 1
OS: All

The issue names no files or tests. Start by reviewing how JMeter is packaged and released and how an image would be published under Docker Hub's apache namespace; define the supported image contents, build and publication process, and verification needed for an official image to be available.

Written by the indexing model from the issue text.