fix(ignitor signalslistener): always listen for SIGINT

[McSneaky]

Proposed changes

This PR will make Ignitor to always listen for SIGINT so server is killable in containers.
Also ads Shutting down server... message when shutdown process is started

Fixes: adonisjs-community/create-adonis-ts-app#5

Types of changes

What types of changes does your code introduce?

Put an x in the boxes that apply

• Bugfix (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 not work as expected)

Checklist

• I have read the CONTRIBUTING doc
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works.
• I have added necessary documentation (if appropriate)

Further comments

This is how killing server looks after change:
From left:
CTRL + C while attached to container
CTRL + C while running server in bash
SIGTERM from another bash

Before change:

Only way to kill container is open another bash instance and do docker kill CONTAINER_ID

[thetutlage]

Lemme search a bit on this topic, before merging this

[thetutlage]

Modules should never have hardcoded console statements

[McSneaky]

Hmm, should use debug or logger module instead?

[thetutlage]

@McSneaky Maybe we both can collaborate on this and see what's the best way to improve the behavior. For now, I am closing the PR as part of housekeeping