added github actions, dependabot and some badges to readme

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: yarn
+    directory: /
+    schedule:
+      interval: weekly

.github/workflows/ci.yml

@@ -0,0 +1,35 @@
+name: CI
+
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+
+jobs:
+  unit-tests:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node:
+          - 18
+          - 20
+          - 21
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node }}
+      - name: Install Dependencies
+        run: yarn install
+      - name: Lint
+        run: yarn lint
+      - name: Test
+        run: yarn test --coverage
+      - name: Coveralls
+        if: matrix.node == '18'
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}

README.md

@@ -1,8 +1,39 @@
+<div id="top"></div>
+
+[![Build][build-shield]][build-url]
+[![Coverage][coverage-shield]][coverage-url]
+[![Language][language-shield]][build-url]
+[![MIT License][license-shield]][license-url]
+
+<br />
+<div align="center">
+  <h1 align="center">node-app-attest</h1>
+  <p align="center">
+    JavaScript implementation of the App Attest protocol for node.js
+  </p>
+</div>
+
+## About
+
 A JavaScript implementation of the App Attest protocol, which checks whether clients connecting to your server are valid instances of your app.
 
 
-Other implementations:
+## Other implementations
 
 * Swift: https://github.com/iansampson/AppAttest
 * Kotlin/Java: https://github.com/veehaitch/devicecheck-appattest
 * Node: https://github.com/srinivas1729/appattest-checker-node
+
+
+## License
+
+MIT License. See `LICENSE.txt` for more information.
+
+[build-shield]: https://img.shields.io/github/actions/workflow/status/uebelack/node-app-attest/ci.yml?branch=main&style=for-the-badge
+[build-url]: https://github.com/uebelack/node-app-attest/actions/workflows/ci.yml
+[language-shield]: https://img.shields.io/github/languages/top/uebelack/node-app-attest.svg?style=for-the-badge
+[language-url]: https://github.com/uebelack/node-app-attest
+[coverage-shield]: https://img.shields.io/coveralls/github/uebelack/node-app-attest.svg?style=for-the-badge
+[coverage-url]: https://coveralls.io/github/uebelack/node-app-attest
+[license-shield]: https://img.shields.io/github/license/uebelack/node-app-attest.svg?style=for-the-badge
+[license-url]: https://github.com/uebelack/node-app-attest/blob/master/LICENSE.txt