chore(docker): create distroless final image

[meysam81]

Description

Distroless images have less vulnerabilities and are safer in production environments. Additionally, they will have no shell access and that reduces the attack surface even further.

ealen/echo-server:latest vulnerabilities

ealen/echo-server:local vulnerabilities

Usually, using distroless images also result in reduced final docker image size, however, in the case of ealen/echo-server, that resulted in excess of ~6MiB 🤷 👇

Comparing the size of the images

Related Issue

Motivation and Context

It will help further secure the software supply chain. Most of the people using the codes in this repository use it out of the box, without further modifications. This distroless final image will give them a good and sane default.

How Has This Been Tested

Yes, it is working and functional.

Types of changes

• 🐛Bug fix (non-breaking change which fixes an issue)
• 🚀New feature (non-breaking change which adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.