Fix storage account connection string configuration in Infrastructure as Code

[Copilot]

Summary

This PR fixes the runtime error in the cpu-app where the /api/app/test endpoint was throwing InvalidOperationException: Storage account connection string is not configured.

Problem

The application code was correctly looking for a storage account connection string via app.GetConnectionString("StorageAccount"), but the infrastructure deployment (main.bicep) was not provisioning a storage account or configuring the connection string in the web app's settings.

Solution

Updated the Bicep template to:

1. Add Azure Storage Account resource - Provisions a Standard_LRS storage account with secure defaults
2. Configure connection string in app settings - Sets ConnectionStrings__StorageAccount which maps to ConnectionStrings:StorageAccount in .NET Core configuration
3. Add storage account name output - Provides visibility into the provisioned storage account

Changes Made

• main.bicep: Added storage account resource and app setting configuration
• .gitignore: Added main.json to exclude generated ARM templates

Technical Details

The connection string is dynamically generated using the storage account's name and primary key:

{
  name: 'ConnectionStrings__StorageAccount'
  value: 'DefaultEndpointsProtocol=https;AccountName=${storageAccount.name};AccountKey=${storageAccount.listKeys().keys[0].value};EndpointSuffix=core.windows.net'
}

This resolves the runtime error while maintaining minimal changes to the existing codebase.

Fixes #68.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• aka.ms
  • Triggering command: bicep build main.bicep (dns block)
  • Triggering command: bicep build main.bicep --stdout (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

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