Add GHA workflow which runs grunt lint task.
diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
new file mode 100644
index 0000000..6a32440
--- /dev/null
+++ b/.github/workflows/main.yaml
@@ -0,0 +1,40 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+  schedule:
+    - cron: '0 1 * * *'
+
+permissions:
+  contents: read  # for actions/checkout to fetch code
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+
+    steps:
+      - uses: actions/checkout@master
+
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 18
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: |
+          npm install
+
+      - name: Grunt lint
+        run: |
+          node_modules/.bin/grunt jshint