feat: add link checker

Author: CahidArda

.github/workflows/link-checker.yml

@@ -0,0 +1,72 @@
+name: Link Checker
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+  schedule:
+    - cron: "0 2 * * *"
+
+jobs:
+  check-internal:
+    runs-on: ubuntu-latest
+    if: github.event_name != 'schedule'
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: pnpm/action-setup@v4
+        with:
+          version: 9
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: pnpm
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Build and start
+        run: pnpm next build && pnpm next start &
+
+      - name: Wait for server
+        run: sleep 5
+
+      - name: Check internal links
+        run: pnpm linkinator http://localhost:3000 --recurse --skip "^(?!http://localhost)"
+
+  check-external:
+    runs-on: ubuntu-latest
+    if: github.event_name == 'schedule'
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: pnpm/action-setup@v4
+        with:
+          version: 9
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: pnpm
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Build and start
+        run: pnpm next build && pnpm next start &
+
+      - name: Wait for server
+        run: sleep 5
+
+      - name: Check all links
+        run: pnpm linkinator http://localhost:3000 --recurse
+
+      - name: Notify Slack on failure
+        if: failure()
+        run: |
+          curl -X POST ${{ secrets.SLACK_WEBHOOK_URL }} \
+            -H 'Content-type: application/json' \
+            -d '{"text": "🔴 Dead links detected in nightly link check. <${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}|View run>"}'

package.json

@@ -72,6 +72,7 @@
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-react": "^7.37.4",
     "eslint-plugin-tailwindcss": "^3.18.0",
+    "linkinator": "^7.6.1",
     "postcss": "^8.5.1",
     "prettier": "^3.4.2",
     "prettier-plugin-tailwindcss": "^0.6.11",