CI for the zrok NodeJS SDK

.github/workflows/node-sdk.yml

@@ -46,6 +46,7 @@ jobs:
       run: echo ::set-output name=TAG::$(git describe --tags --abbrev=0)
 
     - name: Update zrok NodeJS-SDK's package.json version based on current zrok repo git tag
+      if: github.ref == 'refs/heads/main'
       run: |
         cd ${{ runner.workspace }}/${{ github.event.repository.name }}/sdk/nodejs/sdk
         npm version ${{ steps.tag.outputs.TAG }} --no-git-tag-version --allow-same-version
@@ -54,6 +55,7 @@ jobs:
         git commit -am "Update package.json version to ${{ steps.tag.outputs.TAG }}" || echo "No changes to commit"
 
     - name: Push changes to zrok NodeJS-SDK's package.json
+      if: github.ref == 'refs/heads/main'
       uses: ad-m/github-push-action@master
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
@@ -88,9 +90,8 @@ jobs:
         NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
 
     - name: NPM Publish
+      if: github.ref == 'refs/heads/main'
       uses: JS-DevTools/npm-publish@v1
       with:
         token: ${{ secrets.NPM_TOKEN }}
         access: public
-      if: |
-        startsWith(github.ref, 'refs/tags/')