feat: add randomized region selection for azd deployments

- Add preprovision hook to automatically select random region
- Create randomize-region scripts for both bash and PowerShell
- Limit allowed regions in main.bicep
- Hook runs before provisioning to set AZURE_LOCATION env var

Author: dbarkol

azure.yaml

@@ -10,17 +10,17 @@ services:
     host: function
 
 hooks:
-  # preprovision:
-  #   posix:
-  #     shell: sh
-  #     run: ./scripts/setup-app-registration.sh
-  #     interactive: false
-  #     continueOnError: false
-  #   windows:
-  #     shell: pwsh
-  #     run: ./scripts/setup-app-registration.ps1
-  #     interactive: false
-  #     continueOnError: false
+  preprovision:
+    posix:
+      shell: sh
+      run: ./scripts/randomize-region.sh
+      interactive: false
+      continueOnError: false
+    windows:
+      shell: pwsh
+      run: ./scripts/randomize-region.ps1
+      interactive: false
+      continueOnError: false
   postprovision:
     windows:
       shell: pwsh

infra/main.bicep

@@ -7,7 +7,7 @@ param environmentName string
 
 @minLength(1)
 @description('Primary location for all resources')
-@allowed([ 'westus2', 'westus3', 'eastus2'])
+@allowed([ 'westus2', 'westus3', 'eastus2', 'northcentralus'])
 @metadata({
   azd: {
     type: 'location'

scripts/randomize-region.ps1

@@ -0,0 +1,11 @@
+# Randomly select one of the allowed regions and set it as the default
+# Run this script before 'azd provision' or 'azd up' to use a random region
+# without being prompted. Otherwise, azd will prompt you to select a region.
+
+$regions = @("westus2", "westus3", "eastus2", "northcentralus")
+$selectedRegion = Get-Random -InputObject $regions
+
+Write-Host "🎲 Randomly selected region: $selectedRegion" -ForegroundColor Green
+azd env set AZURE_LOCATION $selectedRegion
+Write-Host "✅ Region set. Run 'azd provision' to deploy without being prompted." -ForegroundColor Green
+Write-Host "   To change: azd env set AZURE_LOCATION <region>" -ForegroundColor Gray

scripts/randomize-region.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+# Randomly select one of the allowed regions and set it as the default
+# Run this script before 'azd provision' or 'azd up' to use a random region
+# without being prompted. Otherwise, azd will prompt you to select a region.
+
+REGIONS=("westus2" "westus3" "eastus2", "northcentralus")
+RANDOM_INDEX=$((RANDOM % 3))
+SELECTED_REGION="${REGIONS[$RANDOM_INDEX]}"
+
+echo "🎲 Randomly selected region: $SELECTED_REGION"
+azd env set AZURE_LOCATION "$SELECTED_REGION"
+echo "✅ Region set. Run 'azd provision' to deploy without being prompted."
+echo "   To change: azd env set AZURE_LOCATION <region>"