ci: deploy to github pages

.github/workflows/deploy.yml

@@ -0,0 +1,57 @@
+name: deploy
+
+on:
+  workflow_dispatch: {}
+  push:
+    branches:
+      - main
+
+env:
+  NODE_VERSION: '18.12.0'
+
+jobs:
+  deploy:
+    runs-on: ubuntu-22.04
+
+    permissions:
+      contents: read
+      pages: write
+      id-token: write
+
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Cache node modules
+        uses: actions/cache@v3
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-node-${{ env.NODE_VERSION }}-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-${{ env.NODE_VERSION }}
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Prettier
+        run: npm run prettier:check
+
+      - name: Build
+        run: npm run build -- --base /my-css-journey/
+
+      - uses: actions/configure-pages@v3
+
+      - uses: actions/upload-pages-artifact@v1
+        with:
+          path: dist
+
+      - name: Deploy
+        id: deployment
+        uses: actions/deploy-pages@v2

.github/workflows/pr.yml

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+name: pr
+
+on:
+  pull_request:
+    branches:
+      - '**'
+
+jobs:
+  build:
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        node: ['18.12.0', '20.0.0']
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Cache node modules
+        uses: actions/cache@v3
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-node-${{ matrix.node }}-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-${{ matrix.node }}
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node }}
+      - name: Install dependencies
+        run: npm ci
+      - name: Prettier
+        run: npm run prettier:check