⛓️ Check build for broken links

- Fail build when Astro site contains broken links.
- Add ability to test for broken static links.

[📖 Detect Broken Links](https://www.notion.so/centrapay/Detect-broken-links-9dc17ee52456481e97db0e1847d902d8)

Test plan: Expect to see build step passing in pipeline.

.github/workflows/validate.yml

@@ -1,4 +1,4 @@
-name: Validate Jekyll Site
+name: Validate Site
 
 on:
   workflow_dispatch:
@@ -7,10 +7,10 @@ on:
       - master
 
 jobs:
-  jekyll:
+  validate:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: ruby/setup-ruby@v1
         with:
           bundler-cache: true
@@ -29,3 +29,4 @@ jobs:
       - run: yarn lint
       - run: yarn test
       - run: ./build.sh
+      - run: yarn linkinator

package.json

@@ -2,6 +2,7 @@
   "private": true,
   "scripts": {
     "lint": "eslint --ext .js,.mjs,.ts,.vue .",
+    "linkinator": "linkinator dist/ --recurse --verbosity error --skip 'twitter.com|www.farmlands.co.nz|www.instagram.com|yourapp.example.com|centrapay-docs.dev.s3-website-ap-southeast-1.amazonaws.com/api'",
     "dev": "astro dev",
     "build": "astro build",
     "preview": "astro preview",
@@ -28,6 +29,7 @@
     "flexsearch": "^0.7.31",
     "glob": "^8.1.0",
     "gray-matter": "^4.0.3",
+    "linkinator": "^5.0.2",
     "mdast-util-to-string": "^3.1.1",
     "mermaid": "^9.3.0",
     "remark-html": "^15.0.2",

src/pages/api/[...slug].astro

@@ -15,9 +15,10 @@ export async function getStaticPaths() {
 
 const { entry } = Astro.props;
 const { Content, headings } = await entry.render();
+const previewImg = entry.data.img || '/default-cover.jpg';
 const { title, description } = entry.data;
 ---
-<BaseLayout title={title} description={description}>
+<BaseLayout title={title} description={description} img={previewImg}>
   <div class="relative mx-auto desktop-gutters flex justify-center">
     <div class="min-w-0 max-w-2xl flex-auto px-8 pb-16 pt-8 xl:pt-16 lg:max-w-none">
       <article>