Add CI workflow

.editorconfig

@@ -13,3 +13,7 @@ insert_final_newline = true
 [*.md]
 indent_style = space
 indent_size = 4
+
+[*.yml]
+indent_style = space
+indent_size = 2

.github/workflows/ci.yml

@@ -0,0 +1,19 @@
+name: CI
+
+on:
+  push:
+    branches: ["master"]
+  pull_request:
+    branches: ["master"]
+  workflow_dispatch:
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version-file: "package.json"
+      - run: npm ci --no-fund
+      - run: npm run lint