ci: add lint workflow

.github/workflows/lint.yml

@@ -0,0 +1,23 @@
+name: ESLint
+
+on: [push]
+
+jobs:
+  run-linters:
+    name: Run linters
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out Git repository
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      - name: Install Node.js dependencies
+        run: yarn install -D
+
+      - name: Run linter
+        run: yarn lint

package.json

@@ -7,6 +7,7 @@
     "start:build": "astro check && astro build && astro preview --host",
     "build": "astro check && astro build",
     "start": "astro preview --host",
+    "lint": "astro check",
     "astro": "astro"
   },
   "dependencies": {