Move Docker image publishing to Publish job

[Alexey Palazhchenko]

golang-tip/.github/workflows/build.yml

Lines 48 to 64 in bd6b3b8

       # skip push for PRs 
       # move to `publish` job 
       # TODO https://github.com/AlekSi/golang-tip/issues/8 
  
       - name: Login into Docker registries 
         if: github.event_name != 'pull_request' 
         run: | 
           docker login --username aleksi --password ${{ secrets.DOCKERHUB_TOKEN }} 
           docker login ghcr.io --username aleksi --password ${{ secrets.GITHUB_TOKEN }} 
  
       - name: Upload Docker images 
         if: github.event_name != 'pull_request' 
         run: | 
           docker tag golang-tip:${{ env.GO_BRANCH }} aleksi/golang-tip:${{ env.GO_BRANCH }} 
           docker tag golang-tip:${{ env.GO_BRANCH }} ghcr.io/aleksi/golang-tip:${{ env.GO_BRANCH }} 
           docker push aleksi/golang-tip:${{ env.GO_BRANCH }} 
           docker push ghcr.io/aleksi/golang-tip:${{ env.GO_BRANCH }}