Bootcamp update 5th and 6th editions

[JTrillo]

No description provided.

[Copilot]

Pull request overview

This PR updates the bootcamp materials to the 5th and 6th editions, modernizing GitHub Actions workflows and improving documentation across multiple demo sections.

Changes:

• Updates GitHub Actions to use newer action versions (checkout@v6, setup-node@v6, artifact actions)
• Adds currency support to the custom commodity price action with input validation
• Updates workflow call documentation to reflect current nesting/stacking limits
• Improves service containers documentation and examples
• Adds integration test examples using service containers
• Modernizes Docker build processes and updates usernames in examples

Reviewed changes

Copilot reviewed 19 out of 19 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
10-custom-action/readme.md	Adds currency parameter to custom action, updates to ES modules, corrects tag version to v1.0.0
10-custom-action/action-files/index.js	Converts to ES6 imports, adds currency input validation, updates commodity prices
10-custom-action/action-files/action.yml	Adds currency input parameter, updates Node.js runtime to node20
10-custom-action/action-files/README.md	Documents new currency parameter with possible values
09-workflow-calls/readme.md	Updates reusable workflow nesting limitations to reflect 4-level maximum
09-workflow-calls/01-creating-reusable-workflow/readme.md	Updates action versions throughout examples
08-continous-delivery/readme.md	Updates action versions and Docker build examples with placeholder usernames
06-service-containers/readme.md	Improves documentation clarity, adds cleanup instructions for obsolete files
05-integration-tests/readme.md	Adds service containers example for integration tests
04-working-with-build-artifacts/readme.md	Updates action versions, adds performance improvement note, includes hidden files handling
03-running-multiple-jobs/readme.md	Updates checkout action version across all job examples
02-multiple-target-environments/readme.md	Updates action versions in matrix strategy examples
01-setup-ci/readme.md	Updates checkout action version and removes trailing whitespace
.start-code/hangman-api/Dockerfile	Removes trailing blank lines
.github/workflows/test-custom-action.yml	Adds currency input to custom action usage, updates output echo
.github/workflows/reusable-node-build.yml	Updates action versions to v6
.github/workflows/ci.yml	Updates action versions to v6
.github/workflows/cd-using-docker-actions.yml	New file demonstrating Docker actions approach for CD
.github/workflows/cd-docker.yml	Updates action versions and adds username placeholders

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