chore(docker): remove debugging output by default

[gustavovalverde]

Motivation

When initiating a Zebra node using Docker, there's way too much output at the beginning, making it hard to identify information that we're specifically showing in the interface.

Solution

• Remove the -x option from the entrypoing

Tests

Not extra testing required

PR Author's Checklist

• The PR name will make sense to users.
• The PR provides a CHANGELOG summary.
• The solution is tested.
• The documentation is up to date.
• The PR has a priority label.

PR Reviewer's Checklist

• The PR Author's checklist is complete.
• The PR resolves the issue.