PullRequest With App Service staging slot

pipeline.yml

trigger:
  branches:
    include:
      - master
pr:
  - master

pool:
  vmImage: ubuntu-latest

variables:
  buildConfiguration: 'Release'
  workingDirectory: '$(System.DefaultWorkingDirectory)/src/MVCApp/'
  prId: $(System.PullRequest.PullRequestId)

stages:
- stage: Build
  displayName: Build app
  
  jobs:
  - job: Build
    displayName: Build

    steps:
    - task: DotNetCoreCLI@2
      displayName: Restore
      inputs:
        command: restore
        projects: $(workingDirectory)/*.csproj

    - task: DotNetCoreCLI@2
      displayName: Build
      inputs:
        command: 'build'
        projects: |
          $(workingDirectory)/*.csproj
        arguments: --output $(System.DefaultWorkingDirectory)/publish_output --configuration Release

    - task: DotNetCoreCLI@2
      displayName: Publish
      inputs:
        command: publish
        publishWebProjects: false
        projects: $(workingDirectory)/*.csproj
        arguments: '--configuration Release --output $(System.DefaultWorkingDirectory)/publish'
        zipAfterPublish: true

    - publish: '$(System.DefaultWorkingDirectory)/publish'
      artifact: drop

- stage: Create_Slot
  displayName: Create Pull Request Env
  dependsOn: Build
  condition: and(succeeded(), eq(variables['Build.Reason'], 'PullRequest'))
  jobs:
    - job: CreateSlot
      displayName: CreateSlot
      
      steps:
      - task: AzureCLI@2
        inputs:
          azureSubscription: '{Your Service Connection Name}'
          scriptType: 'bash'
          scriptLocation: 'inlineScript'
          inlineScript: |
            az deployment group create --resource-group rg-lab --template-file {Bicep file path for create slot} \
            --parameters prId=$(prId) \
            --parameters appServiceName=app-appservice-lab
          
      - download: current
        artifact: drop
          
      - task: AzureRmWebAppDeployment@4
        inputs:
          ConnectionType: 'AzureRM'
          azureSubscription: '{Your Service Connection Name}'
          appType: 'webApp'
          WebAppName: 'app-appservice-lab'
          deployToSlotOrASE: true
          ResourceGroupName: 'rg-lab'
          SlotName: 'pr-$(prId)'
          packageForLinux: '$(Pipeline.Workspace)/drop/MVCApp.zip'