add javascript/eslint action

.gitea/workflows/javascript.yaml

@@ -0,0 +1,20 @@
+name: Javascript Linter
+run-name: ${{ gitea.actor }} is running eslint
+on: [push]
+
+jobs:
+  Javascript-Lint:
+    runs-on: ubuntu-22.04
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+
+      - name: Install dependencies
+        run: |
+          npm install eslint
+
+      - name: Run checking
+        run: |
+          npx eslint app/static/app.js