chore(actions): add npm-publish

Signed-off-by: John Molakvoæ <skjnldsv@users.noreply.github.com>

.github/workflows/npm-publish.yml

@@ -0,0 +1,54 @@
+# This workflow is provided via the organization template repository
+#
+# https://github.com/nextcloud/.github
+# https://docs.github.com/en/actions/learn-github-actions/sharing-workflows-with-your-organization
+
+name: Publish
+
+on:
+  release:
+    types: [published]
+
+permissions:
+  contents: read
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+
+    name: Build and publish to npm
+    steps:
+      - name: Check actor permission level
+        uses: skjnldsv/check-actor-permission@e591dbfe838300c007028e1219ca82cc26e8d7c5 # v2.1
+        with:
+          require: admin
+
+      - name: Checkout
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v3
+
+      - name: Read package.json node and npm engines version
+        uses: skjnldsv/read-package-engines-version-actions@1bdcee71fa343c46b18dc6aceffb4cd1e35209c6 # v1.2
+        id: versions
+        with:
+          fallbackNode: '^12'
+          fallbackNpm: '^6'
+
+      - name: Set up node ${{ steps.versions.outputs.nodeVersion }}
+        uses: actions/setup-node@8c91899e586c5b171469028077307d293428b516 # v3
+        with:
+          node-version: ${{ steps.versions.outputs.nodeVersion }}
+
+      - name: Set up npm ${{ steps.versions.outputs.npmVersion }}
+        run: npm i -g npm@"${{ steps.versions.outputs.npmVersion }}"
+
+      - name: Install dependencies & build
+        run: |
+          npm ci
+          npm run build --if-present
+
+      - name: Publish
+        run: |
+          npm config set //registry.npmjs.org/:_authToken=$NODE_AUTH_TOKEN
+          npm publish
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}