I want to build custom docker image build number for each environment separately through pipeline

I am working on Azure DevOps with Azure Kubernetes Services.

I have a task to build custom Docker Image build number for each environment like Dev, Sit, Pre-prod, Prod separately likewise, Dev-0.0.1, Sit-0.0.1, Preprod-0.0.1, Prod-0.0.1 . Please suggest me with your solution.

My Pipeline looks like--

trigger:
  - main
  - dev
  - pre-prod
  - sit

pr: none
pool:
  name: "mypool"

variables:
  ${{ if eq(variables['Build.SourceBranchName'], 'main') }}:
    namespace: prod
  ${{ elseif eq(variables['Build.SourceBranchName'], 'pre-prod') }}:
    namespace: preprod
  ${{ elseif eq(variables['Build.SourceBranchName'], 'sit') }}:
    namespace: sit
  ${{ elseif eq(variables['Build.SourceBranchName'], 'dev') }}:
    namespace: dev

  major-minor: '$(namespace).0.0'
  revision: $[ counter(variables['major-minor'],0) ]

stages:
  - stage: "build"
    jobs:
      - job: build
        steps:
          - task: Maven@3
            inputs:
              mavenPomFile: 'pom.xml'
              goals: 'clean install'
              publishJUnitResults: true
              testResultsFiles: '**/surefire-reports/TEST-*.xml'
              javaHomeOption: 'JDKVersion'
              mavenVersionOption: 'Default'
              mavenAuthenticateFeed: false
              effectivePomSkip: false
              sonarQubeRunAnalysis: false

          - task: Docker@2
            displayName: "Build image and publish to acr"
            inputs:
              containerRegistry: 'XXXXXXXXXXXX'
              repository: 'XXXXXXXXXXXXX'
              command: 'buildAndPush'
              Dockerfile: '**/Dockerfile'
              tags: '$(major-minor).$(revision)'