Proper blog example

[keskiju]

Implement a proper blog example that demonstates different technologies.

Media:

• [ ] Add/remove media files (demonstrates file upload/download and storage buckets)
• [ ] Generate thumbnails and previews for media files (demonstrates background jobs implemented as Kubernetes jobs)
• [ ] Select a media file for blog post

Posts:

• [ ] Show new blog posts automatically in real-time (demonstrates websockets and postgresql notifications)
• [ ] Generate blog post PDF using a server-side pdf template (demonstrates POD)
• [ ] Generate blog post PDF using react web ui as a template (e.g. headless chrome or some other mechanism)
• [ ] Alternative GraphQL example (demonstrates GraphQL)
• [ ] Also some cron job example? (demonstrates cron jobs)