GitHub Actions: Add basic ESLinter checks

.github/workflows/linters.yml

@@ -13,11 +13,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - name: Install jshint
+    - name: Install linters
       run: |
-        sudo npm install -g jshint@2.13.6
+        sudo npm install -g jshint@2.13.6 eslint@8.57.0
     - name: Run jshint
       run: jshint internal/ui/static/js/*.js
+    - name: Run ESLint
+      run: eslint internal/ui/static/js/*.js
 
   golangci:
     name: Golang Linter

internal/ui/static/js/.eslintrc.json

@@ -0,0 +1,9 @@
+{
+    "env": {
+        "browser": true,
+        "es2017": true
+    },
+    "rules": {
+        "indent": ["error", 4]
+    }
+}