posts: move files into date-prefixed directories

Using date prefixes is better for sorting articles at a glance. Using
directories is more uniform if and when I need to add files to go with
an article.

content/posts/2021-02-09-the-great-nix-exode/index.md

@@ -0,0 +1,29 @@
+---
+title: "The Great Nix Exode"
+date: 2021-02-09T20:38:51+01:00
+draft: false # I don't care for draft mode, git has branches for that
+tags:
+  - self-hosting
+  - nix
+categories:
+  - software
+series:
+favorite: false
+disable_feed: false
+---
+
+After reading up on [NixOS][nixos] and its package manager, [Nix][nix], I have
+finally taken the plunge and migrated my website and various services to it.
+
+[nixos]: https://nixos.org/
+[nix]: https://nixos.wiki/wiki/Nix
+
+<!--more-->
+
+This is a very simple blog post to mark the event, I have finally graduated from
+my pile of `docker-compose` that needed massaging every time I wanted to bring
+up all my services at once.
+
+You can find the relevant configurations files on this [repository][nix-config]
+
+[nix-config]: https://gitea.belanyi.fr/ambroisie/nix-config