chore: update readme

README.md

@@ -1,4 +1,4 @@
-# My NixOS Configurations ❄ 
+# Snowfield ❄ 
 [![Build status](https://ci.julienmalka.me/badges/JulienMalka_snowfield_nix-eval.svg)](https://ci.julienmalka.me/#/builders/16) [![built with nix](https://img.shields.io/static/v1?logo=nixos&logoColor=white&label=&message=Built%20with%20Nix&color=41439a)](https://builtwithnix.org)
 
 This repository contains the configurations of my machines using NixOS. 
@@ -7,19 +7,6 @@ This repository contains the configurations of my machines using NixOS.
 
 NixOS is a linux distribution based on the Nix package manager. It allows fully reproducible builds and a declarative configuration style, using a functionnal langage called Nix (yes, it is the same name as the package manager and the OS).
 
-### *What is a flake ?*
-
-This whole repository is a flake. It is an experimental feature of Nix, allowing for pure evaluation of code. Dependency are fully specified and locked.
-
-### *How does this work ?*
-
-#### Machines 
-
-This project manage the configuration of three machines :
-- **Macintosh**, a thinkpad laptop,
-- **Lisa**, a high performance server,
-- **Newton**, a low performance stockage server.
-
 Machines configurations are located in the machines folder, and are using all the custom modules defined in this project.
 
 #### Modules
@@ -28,7 +15,7 @@ This configuration defines a number of custom NixOS and home-manager modules. Th
 
 #### Secrets
 
-Secrets are stored in the secrets folder. They are uncrypted upon system activation using the host ssh key. Secrets are managed using nix-sops.
+Secrets are stored in the secrets folder. They are uncrypted upon system activation using the host ssh key. Secrets are managed using agenix.
 
 ### Inspirations