FEAT: Added Azure Key Vault for storing application secrets

[bolt-io]

Purpose

Adding Azure Key Vault to the configuration providers for storing secrets within Azure Key Vault instead of locally or in app configuration.

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

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

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code

Add KeyVault Secret
Add Key Vault to appsettings.json
Try to get secret set in Key Vault by breakpoint in code

What to Check

Verify that the following are valid

• Can read Secret set in Azure Key Vault

Other Information