Package and publish syn2mas to npm (#2023)

Co-authored-by: Quentin Gliech <quenting@element.io>

.github/workflows/build.yaml

@@ -251,6 +251,31 @@ jobs:
             "${{ env.IMAGE }}@${{ fromJSON(steps.bake.outputs.metadata).regular['containerimage.digest'] }}" \
             "${{ env.IMAGE }}@${{ fromJSON(steps.bake.outputs.metadata).debug['containerimage.digest'] }}" \
             "${{ env.IMAGE_SYN2MAS }}@${{ fromJSON(steps.bake.outputs.metadata).syn2mas['containerimage.digest'] }}"
+          
+
+  syn2mas:
+    name: Release syn2mas on NPM
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the code
+        uses: actions/checkout@v4.1.0
+
+      - name: Install Node
+        uses: actions/setup-node@v3.8.1
+        with:
+          node-version-file: ./tools/syn2mas/.nvmrc
+
+      - name: Install Node dependencies
+        working-directory: ./tools/syn2mas
+        run: npm ci
+
+      - name: Publish
+        uses: JS-DevTools/npm-publish@v3
+        with:
+          package: ./tools/syn2mas
+          token: ${{ secrets.NPM_TOKEN }}
+          provenance: true
+          dry-run: ${{ !startsWith(github.ref, 'refs/tags/') }}
 
 
   release:
@@ -260,6 +285,7 @@ jobs:
     needs:
       - build-binaries
       - build-image
+      - syn2mas
     steps:
       - name: Download the artifacts from the previous job
         uses: actions/download-artifact@v3
@@ -334,4 +360,4 @@ jobs:
             mas-cli-aarch64-macos.tar.gz
             mas-cli-x86_64-linux.tar.gz
             mas-cli-x86_64-macos.tar.gz
-          draft: true
+          draft: true