Add a GitHub workflow to publish the viewer on NPM.

Author: dbrnz

.github/workflows/publish.yaml

@@ -0,0 +1,43 @@
+name: Publish the Flatmap Viewer as a npm package
+on:
+  workflow_dispatch:
+
+permissions:
+  id-token: write  # Required for OIDC
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Set the timezone to New Zealand
+        uses: szenius/set-timezone@v2.0
+        with:
+          timezoneLinux: 'Pacific/Auckland'
+
+      - name: Checkout
+        uses: actions/checkout@v6
+        with:
+          fetch-depth: 1
+          submodules: recursive
+
+      - name: Install Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 'lts/*'
+          registry-url: 'https://registry.npmjs.org'
+
+      - name: Update npm
+        # Install the latest version of npm since we need npm 11.5.1 or later to publish to npm using OIDC (see
+        # https://docs.npmjs.com/trusted-publishers).
+        run: npm install -g npm@latest
+
+      - name: Install bun
+        run: npm install -g bun
+
+      - name: Build the Flatmap Viewer
+        run: bun install
+
+      - name: Publish the Flatmap Viewer on npm
+        run: npm publish --access public --no-git-checks