Add GitHub Actions CI

Author: Recoveredd

.github/workflows/ci.yml

@@ -0,0 +1,46 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    name: Test on Node ${{ matrix.node-version }}
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version:
+          - 20
+          - 22
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Set up Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Typecheck
+        run: npm run typecheck
+
+      - name: Build
+        run: npm run build
+
+      - name: Test
+        run: npm test

README.md

@@ -1,5 +1,7 @@
 # json-html-kit
 
+[![CI](https://github.com/Recoveredd/json-html-kit/actions/workflows/ci.yml/badge.svg)](https://github.com/Recoveredd/json-html-kit/actions/workflows/ci.yml)
+
 Modern TypeScript utilities for rendering arbitrary JSON as safe, themed, human-friendly HTML.
 
 `json-html-kit` is designed for reports, admin tools, demos, documentation pages and support dashboards where a raw JSON tree is too technical, but building a custom view is too slow.