Add workflow

Author: mattbaileyuk

.github/workflows/jsonata.yml

@@ -0,0 +1,68 @@
+name: Build and publish JSONata
+on:
+  push:
+    branches: [ master, v1 ]
+  pull_request:
+    branches: [ master, v1 ]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [12.x, 14.x, 16.x, 18.x]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm install
+      - run: npm test
+  publish:
+    needs: build
+    runs-on: ubuntu-latest
+    if: ${{ github.event_name == 'push' && github.repository == 'jsonata-js/jsonata' }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Use Node.js 18.x
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18.x
+      - name: Install and build
+        run: npm install && npm test
+      - name: Publish to NPM
+        id: npmpub
+        uses: JS-DevTools/npm-publish@v1
+        with:
+          token: ${{ secrets.NPM_TOKEN }}
+      - if: steps.npmpub.outputs.type != 'none'
+        run: |
+          echo "Version changed: ${{ steps.npmpub.outputs.old-version }} => ${{ steps.npmpub.outputs.version }}"
+  documentation:
+    needs: build    
+    runs-on: ubuntu-latest
+    if: ${{ github.event_name == 'push' && github.repository == 'jsonata-js/jsonata' }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Use Node.js 18.x
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18.x
+      - name: Build documentation
+        run: |
+          cd website
+          npm install
+          npm run build
+      - name: Deploy to GitHub Pages
+        if: success()
+        run: |
+          cd website
+          git config --global user.name "andrew-coleman"
+          git config --global user.email "[email protected]"
+          echo "machine github.com login andrew-coleman password ${{ secrets.DOCS_AUTH }}" > ~/.netrc
+          npm run publish-gh-pages
+        env:
+          GIT_USER: andrew-coleman