Documentation's link to "unvjohn/nestjs-config" is broken

[ruslanguns]

Bug Report

Documentation

Current behavior

You have a link broken at :
Create a Dockerfile in your project root (e.g., configtut/Dockerfile). Add the contents below to that file. This Dockerfile uses a base image called **unvjohn/nestjs-config** that makes testing the functionality fast and easy. The main features of the base image are:

Link

https://github.com/nestjsplus/config/wiki/Tutorial#Dockerize-the-basic-app