Mongo-Express within clab environments returns with an error

Accessing the mongo-express URL after starting a containerlab returns in an error message:

Turn on admin in config.js to view server stats!

Description

See: https://github.com/mongo-express/mongo-express/issues/809

Expected Behavior

It should be possible to access database information.

Actual Behavior

No database information is shown, instead an error is thrown.

Possible Fix

Update version and set the correct environment variables.

Steps to Reproduce

1. Start one of the containerlabs
2. Access `localhost:8081
3. Error appears

Context

Your Environment

• Version used:
• Environment name and version (e.g. go v1.16.3 on FreeBSD 13.0-current):
• Server type and version:
• Operating System and version: