Update dependency node to v18.12.0

This MR contains the following updates:

Package	Type	Update	Change
node	ironbank-docker	minor	18.11.0 -> 18.12.0
node		minor	18.11.0 -> 18.12.0
node	stage	minor	18.11.0 -> 18.12.0

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Release Notes

nodejs/node

v18.12.0

Compare Source

Notable Changes

This release marks the transition of Node.js 18.x into Long Term Support (LTS) with the codename 'Hydrogen'. The 18.x release line now moves into "Active LTS" and will remain so until October 2023. After that time, it will move into "Maintenance" until end of life in April 2025.

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