feat: add blog content and update preview logic

.env.example

@@ -33,8 +33,8 @@ NEON_BRANCHING_DEMO_QSTASH_TOKEN=
 QSTASH_CURRENT_SIGNING_KEY=
 QSTASH_NEXT_SIGNING_KEY=
 
-BLOG_CDN_URL=
+BLOG_PREVIEW_ENABLED=false
+BLOG_PREVIEW_SECRET=
 BLOG_REPO_OWNER=
 BLOG_REPO_NAME=
 BLOG_GITHUB_TOKEN=
-BLOG_PREVIEW_SECRET=

.github/workflows/sync-fork-main.yml

@@ -0,0 +1,29 @@
+name: Sync Main
+
+on:
+  schedule:
+    - cron: '*/30 * * * *'
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  sync-main:
+    if: ${{ vars.ENABLE_FORK_MAIN_SYNC == 'true' }}
+    runs-on: ubuntu-latest
+    env:
+      UPSTREAM_REPOSITORY: ${{ vars.FORK_MAIN_SYNC_UPSTREAM_REPOSITORY || 'neondatabase/website' }}
+    steps:
+      - name: Checkout fork
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+        with:
+          fetch-depth: 0
+
+      - name: Sync main from upstream
+        run: |
+          git remote add upstream "https://github.com/${UPSTREAM_REPOSITORY}.git"
+          git fetch upstream main
+          git checkout main
+          git reset --hard upstream/main
+          git push origin main --force

.gitignore

@@ -93,6 +93,3 @@ package-lock.json
 
 # Evals directory (test validation for documentation)
 .evals/
-
-# Blog content gets imported automatically
-content/blog