add javascript/eslint action

.eslintrc.js

@@ -0,0 +1,14 @@
+module.exports = {
+    "env": {
+        "browser": true,
+        "es2021": true
+    },
+    "extends": "eslint:recommended",
+    "overrides": [
+    ],
+    "parserOptions": {
+        "ecmaVersion": "latest"
+    },
+    "rules": {
+    }
+}

.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