feat(infrastructure): add availability test for apim (#1327)

<!--- Provide a general summary of your changes in the Title above -->

## Description

<!--- Describe your changes in detail -->

An availability test for the backend. For now will send a health-check
request to web-api-so so verify that the service is up and running with
the all dependencies. The health-endpoint in APIM will send requests to
web-api-so by default, the other services are not exposed yet.

- Adds an availability test towards our APIM. Will probe the deep
version of the health-checks which checks third party URLs together with
Redis and Postgres.
- Will now only target web-api-so as it is the default backend. Should
expose all services like this.

<img width="612" alt="image"
src="https://github.com/user-attachments/assets/a368ed4d-78c5-4966-b363-493c85bd4568">

The frontend availability test:


![image](https://github.com/user-attachments/assets/55cbe387-d246-4b45-bbd4-17722f4117ab)

## Related Issue(s)

- #292 

## Verification

- [ ] **Your** code builds clean without any errors or warnings
- [ ] Manual testing done (required)
- [ ] Relevant automated test added (if you find this hard, leave it and
we'll help out)

## Documentation

- [ ] Documentation is updated (either in `docs`-directory, Altinnpedia
or a separate linked PR in
[altinn-studio-docs.](https://github.com/Altinn/altinn-studio-docs), if
applicable)


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
- Introduced a new parameter `apimUrl` for capturing the APIM instance
URL across various environments (production, staging, test, yt01).
- Added a new module for creating an availability test for the APIM
instance, enhancing monitoring capabilities.

- **Enhancements**
- New output declaration for the Application Insights resource ID,
allowing easier access to the resource identifier post-deployment.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.azure/infrastructure/main.bicep

@@ -39,6 +39,9 @@ param sourceKeyVaultSshJumperSshPublicKey string
 @description('The object ID of the group to assign the Admin Login role for SSH Jumper')
 param sshJumperAdminLoginGroupObjectId string
 
+@description('The URL of the APIM instance')
+param apimUrl string
+
 import { Sku as KeyVaultSku } from '../modules/keyvault/create.bicep'
 param keyVaultSku KeyVaultSku
 
@@ -117,6 +120,18 @@ module appInsights '../modules/applicationInsights/create.bicep' = {
   }
 }
 
+module apimAvailabilityTest '../modules/applicationInsights/availabilityTest.bicep' = {
+  scope: resourceGroup
+  name: 'apimAvailabilityTest'
+  params: {
+    name: '${namePrefix}-dialogporten-health-test'
+    location: location
+    tags: tags
+    appInsightsId: appInsights.outputs.appInsightsId
+    url: '${apimUrl}/health/deep'
+  }
+}
+
 module serviceBus '../modules/serviceBus/main.bicep' = {
   scope: resourceGroup
   name: 'serviceBus'

.azure/infrastructure/prod.bicepparam

@@ -48,3 +48,5 @@ param serviceBusSku = {
 
 // Altinn Product Dialogporten: Developers Prod
 param sshJumperAdminLoginGroupObjectId = 'a94de4bf-0a83-4d30-baba-0c6a7365571c'
+
+param apimUrl = 'https://platform.altinn.no/dialogporten'

.azure/infrastructure/staging.bicepparam

@@ -47,3 +47,5 @@ param serviceBusSku = {
 }
 // Altinn Product Dialogporten: Developers Prod
 param sshJumperAdminLoginGroupObjectId = 'a94de4bf-0a83-4d30-baba-0c6a7365571c'
+
+param apimUrl = 'https://platform.tt02.altinn.no/dialogporten'

.azure/infrastructure/test.bicepparam

@@ -48,3 +48,5 @@ param serviceBusSku = {
 
 // Altinn Product Dialogporten: Developers Dev
 param sshJumperAdminLoginGroupObjectId = 'c12e51e3-5cbd-4229-8a31-5394c423fb5f'
+
+param apimUrl = 'https://altinn-dev-api.azure-api.net/dialogporten'

.azure/infrastructure/yt01.bicepparam

@@ -47,3 +47,5 @@ param serviceBusSku = {
 }
 // Altinn Product Dialogporten: Developers Dev
 param sshJumperAdminLoginGroupObjectId = 'c12e51e3-5cbd-4229-8a31-5394c423fb5f'
+
+param apimUrl = 'https://platform.yt01.altinn.cloud/dialogporten'

.azure/modules/applicationInsights/availabilityTest.bicep

@@ -0,0 +1,54 @@
+@description('The name of the availability test')
+param name string
+
+@description('The location where the resources will be deployed')
+param location string
+
+@description('Tags to apply to resources')
+param tags object
+
+@description('The ID of the Application Insights resource')
+param appInsightsId string
+
+@description('The URL of the availability test')
+param url string
+
+@description('The frequency in seconds at which the test runs')
+param frequency int = 120 // Default is every 2 minutes
+
+@description('The timeout in seconds for the test')
+param timeout int = 60 // Default is 1 minute
+
+resource availabilityTest 'Microsoft.Insights/webtests@2022-06-15' = {
+  name: name
+  location: location
+  tags: union(tags, { 
+    'hidden-link:${appInsightsId}': 'Resource'
+  })
+  kind: 'standard'
+  properties: {
+    Enabled: true
+    SyntheticMonitorId: name
+    Name: name
+    Description: 'Availability test for ${name}'
+    Frequency: frequency
+    Timeout: timeout
+    Kind: 'standard'
+    RetryEnabled: true
+    Locations: [
+      { Id: 'emea-nl-ams-azr' } // Amsterdam
+      { Id: 'emea-se-sto-edge' } // Stockholm
+      { Id: 'emea-gb-db3-azr' } // Dublin
+    ]
+    Request: {
+      RequestUrl: url
+      HttpVerb: 'GET'
+      ParseDependentRequests: false
+    }
+    ValidationRules: {
+      ExpectedHttpStatusCode: 200
+      SSLCheck: true
+      SSLCertRemainingLifetimeCheck: 7
+    }
+  }
+}

.azure/modules/applicationInsights/create.bicep

@@ -53,3 +53,4 @@ resource appInsights 'Microsoft.Insights/components@2020-02-02' = {
 output connectionString string = appInsights.properties.ConnectionString
 output appInsightsWorkspaceName string = appInsightsWorkspace.name
 output appInsightsName string = appInsights.name
+output appInsightsId string = appInsights.id