Add AppConfig + Docker support

[v-cgivens]

Purpose

Adding app config and docker support. Removal of the function key call (move to appconfig).

Type of change

[X ] Bugfix
[X ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

Related Backlog Item or Issue

If applicable, provide a link to the relevant backlog item or issue.

Is this change disruptive or does it break existing applications?

If deploying this change could impact existing applications, please specify.

[ ] Yes
[ ] No

Cross-Repository Dependencies

If this change depends on pull requests in other repositories within the solution, provide the links below.

• gpt-rag
• gpt-rag-agentic
• gpt-rag-ingestion
• gpt-rag-orchestrator

Does this require changes to project documentation?

If the changes add new functionality, update the documentation accordingly.

[X] Yes
[ ] No

Documentation Link

If this change adds a new functionality, provide a link to its documentation.

Code quality checklist

• [X ] I verified the changes locally to ensure they work as expected
• [X ] I have tested the new functionality and ensured existing features still work
• I have updated the CHANGELOG.md file to document these changes
• [X ] I have reviewed the code for readability, maintainability, and adherence to project conventions
• [X ] I have added at least two reviewers to the Pull Request

Contributing guidelines

See CONTRIBUTING.md for more details.