Add CI

.github/workflows/ci.yaml

@@ -0,0 +1,29 @@
+name: Publish
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+  workflow_dispatch:
+
+env:
+  node_version: 22
+
+permissions:
+  id-token: write
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.node_version }}
+          registry-url: "https://registry.npmjs.org"
+
+      - run: npm ci
+
+      - run: npm test

README.md

@@ -6,6 +6,11 @@ The SDK has a small bundle size and support tree shaking.
 
 The SDK is currently under early development and the API can change at any time.
 
+[![License: Apache](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
+[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT)
+[![Stability: experimental](https://img.shields.io/badge/stability-experimental-orange.svg)](#stability)
+[![CI](https://github.com/codex-storage/codex-js/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/codex-storage/codex-js/actions/workflows/ci.yml?query=branch%3Amaster)
+
 ## Breaking changes
 
 - Version 0.1.0 introduces [upload strategy](#upload) to support browser and Node JS.