Azure Linux App Service Installing packages after deploy from DevOps pipeline

Question

I am setting up a CI/CD pipeline in Azure DevOps to deploy the NodeJS app on a Linux hosted app service. The problem is that I have to run all the apt-get script manually, that was created after the deployment. 

YAML code for the deployment:

- stage: Deploy
  displayName: Deploy stage
  dependsOn: Build
  condition: succeeded()
  jobs:
  - deployment: Deploy
    displayName: Deploy
    environment: $(environmentName)
    pool:
      vmImage: $(vmImageName)
    workspace:
      clean: all
    strategy:
      runOnce:
        deploy:
          steps:
          - task: AzureWebApp@1
            displayName: 'Azure Web App Deploy:'
            inputs:
              azureSubscription: $(azureSubscription)
              appType: webAppLinux
              appName: $(webAppName)
              runtimeStack: 'NODE|16-lts'
              package: $(Pipeline.Workspace)/drop/drop$(Build.BuildNumber).zip
              startUpCommand: 'pm2 start index.js --no-daemon'
        on:
         success:
           steps:
           - script: sudo apt-get update
             displayName: apt update
           - script: sudo apt-get -y [SOME LIBS] 
             displayName: try install dependencies

Any solution would be grateful.