MNG-73 Add workflow for gh-pages (#2)

Should work on master as Ola added package.json in different task.

.github/workflows/node.js.yml

@@ -0,0 +1,49 @@
+# This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
+
+name: Node.js CI
+
+on:
+  push:
+    paths-ignore:
+      - '**/*.md'
+
+jobs:
+  build:
+    name: "Build Pokemon Fight application"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: 14.x
+      - run: npm ci
+      - run: npm run build --if-present
+      - run: npm test
+      - uses: actions/upload-artifact@v1
+        name: Upload build as artifact
+        if: always()
+        with:
+          name: pokefight-dist
+          path: ./dist
+  deploy-on-github-pages:
+    name: "Deploy app to GitHub Pages from master branch source code"
+    if: github.ref == 'refs/heads/master'
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/download-artifact@v2
+        with:
+          name: pokefight-dist
+          path: ./dist
+      - name: Deploy app as GitHub Pages
+        uses: peaceiris/actions-gh-pages@v3.7.0-6
+        if: ${{ github.event_name != 'pull_request' && always() }}
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: "./dist"
+          user_name: 'github-actions[bot]'
+          user_email: 'github-actions[bot]@users.noreply.github.com'
+          force_orphan: true
+          keep_files: false