CI: run linter

.github/workflows/ci.yml

@@ -5,7 +5,6 @@ on:
     branches: [ "main" ]
   pull_request:
     branches: [ "main" ]
-  workflow_dispatch:
 
 jobs:
   build:

.github/workflows/lint.yml

@@ -0,0 +1,24 @@
+name: Linter
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  eslint:
+    name: Run ESlint
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Install dependencies
+        run: npm ci
+        working-directory: ./frontend
+
+      - name: Run ESLint
+        run: npx eslint .
+        working-directory: ./frontend