Add CI/CD pipeline with GitHub Actions

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ozers

.github/workflows/ci.yml

@@ -0,0 +1,35 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [18, 20]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint
+        run: npm run lint
+
+      - name: Test
+        run: npm test
+
+      - name: Build
+        run: npm run build

README.md

@@ -6,6 +6,7 @@
 
 Static analysis CLI that scans your Node.js Lambda project and tells you exactly what's slowing down your cold starts — and how to fix it.
 
+[![CI](https://github.com/ozers/lambda-doctor/actions/workflows/ci.yml/badge.svg)](https://github.com/ozers/lambda-doctor/actions/workflows/ci.yml)
 [![npm](https://img.shields.io/npm/v/lambda-doctor)](https://www.npmjs.com/package/lambda-doctor)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)
 [![TypeScript](https://img.shields.io/badge/TypeScript-strict-blue.svg)](https://www.typescriptlang.org/)