chore: formatチェックを追加

.github/workflows/format.yml

@@ -0,0 +1,38 @@
+name: format
+
+on: pull_request
+
+jobs:
+  format:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup Node
+        uses: actions/setup-node@v3
+        with:
+          node-version: '18'
+      - name: Restore app cache
+        uses: actions/cache@v3
+        id: node_modules_cache_id
+        env:
+          cache-name: cache-node-modules
+        with:
+          path: '**/node_modules'
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+      - run: echo '${{ toJSON(steps.node_modules_cache_id.outputs) }}'
+      - if: ${{ steps.node_modules_cache_id.outputs.cache-hit != 'true' }}
+        run: npm install
+      - name: Run format
+        run: npm run format
+      - name: Check diff exists
+        run: |
+          git add -N .
+          git diff
+          line=`git diff | wc -l`
+          if [ $line -gt 0 ]; then
+            echo "You need to format before commit"
+            git diff
+            exit -1
+          fi