* Blog post: Elixir Clustering using Postgres
* Create author, add diagrams.
* Fix date.
* Add author and images.
* Add og and final updates.
* prettify blog post
* add space to blog post link
* prettify authors.json
* Add image with lightmode.
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Co-authored-by: Francesco Sansalvadore <f.sansalvadore@gmail.com>