Setup GitHub Pages deploy workflow

.github/workflows/deploy.yml

@@ -0,0 +1,50 @@
+# NOTE: This name appears in GitHub's Checks API and in workflow's status badge.
+name: deploy
+
+# Trigger the workflow when:
+on:
+  # A push occurs to one of the matched branches.
+  push:
+    branches: [master]
+  # Trigger manually by an user.
+  workflow_dispatch:
+
+jobs:
+  deploy:
+    # NOTE: This name appears in GitHub's Checks API.
+    name: deploy
+    # Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+    permissions:
+      contents: read
+      pages: write
+      id-token: write
+    # Setup github-pages environment
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+      - name: Set up Node.js 20
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20.x'
+          cache: yarn
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile
+      - name: Build app
+        run: yarn build
+      # https://github.com/actions/upload-pages-artifact#example-permissions-fix-for-linux
+      - name: Ensure build files have proper permissions
+        run: |
+          chmod -c -R +rX "dist/" | while read line; do
+            echo "::warning title=Invalid file permissions automatically fixed::$line"
+          done
+      - name: Upload Pages artifact
+        uses: actions/upload-pages-artifact@v2
+        with:
+          path: 'dist/'
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v3

README.md

@@ -2,10 +2,13 @@
 
 [![CI build status][github-ci-build-badge]][github-ci-build-link]
 [![CI lint status][github-ci-lint-badge]][github-ci-lint-link]
+[![Deploy status][github-deploy-badge]][github-deploy-link]
 
 A dApp that lets you wrap or unwrap ROSE on an Oasis EVM-compatible ParaTime.
 
 [github-ci-build-badge]: https://github.com/oasisprotocol/dapp-wrose/actions/workflows/ci-build.yml/badge.svg
 [github-ci-build-link]: https://github.com/oasisprotocol/dapp-wrose/actions?query=workflow:ci-build+branch:master
 [github-ci-lint-badge]: https://github.com/oasisprotocol/dapp-wrose/actions/workflows/ci-lint.yml/badge.svg
 [github-ci-lint-link]: https://github.com/oasisprotocol/dapp-wrose/actions?query=workflow:ci-lint+branch:master
+[github-deploy-badge]: https://github.com/oasisprotocol/dapp-wrose/actions/workflows/deploy.yml/badge.svg
+[github-deploy-link]: https://github.com/oasisprotocol/dapp-wrose/actions?query=workflow:deploy+branch:master