Added an example flake and added mention of the flake in README

README.md

@@ -16,6 +16,8 @@ Binary packages for Linux, macOS and Windows are available on the [release page]
 
 [release page]: https://github.com/agateau/nanonote/releases
 
+It is also possible to install it as a flake. See the [example](nix/example.nix) in the nix folder.
+
 ## Tips and tricks
 
 Even if Nanonote has a minimalist user interface, it comes with some handy shortcuts. Learn more about them from the [tips and tricks page](docs/tips.md).

nix/example.nix

@@ -0,0 +1,59 @@
+{
+description = "An example flake for Nanonote";
+
+# This example flake does probably not work. But it should make it clear how to add Nanonote
+# to your system flake, to be able to install Nanonote on your nix system.
+
+  inputs = {
+
+    # General nixos inputs:
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.05";
+
+    # Home-mamanger inputs
+    home-manager.url = "github:nix-community/home-manager/release-24.05";
+    home-manager.inputs.nixpkgs.follows = "nixpkgs";
+
+    # Adding the nanonote flake input
+    nanonote.url = "github:Morgenkaff/nanonote/add-flake?dir=nix";
+
+  };
+
+  outputs = { self, nixpkgs, home-manager, nanonote, ... }@inputs:
+
+  let
+
+  system = "x86_64-linux";
+
+  in {
+    nixosConfigurations =  {
+      hostname = nixpkgs.lib.nixosSystem {
+        inherit system;
+        specialArgs = { inherit inputs; };
+        modules =  [
+
+          # Create an overlay to install Nanonote as was it part of nixpkgs
+          ({ nixpkgs.overlays = [ nanonote.overlays.default ]; })
+          # And then install it under "environment.systemPackages" in your nix configuration
+
+
+          # Nix cinfiguration
+          ./configuration.nix
+
+          # Home-manager config:
+          home-manager.nixosModules.home-manager
+          {
+
+            # Alternatively create n overlay for use in Home-manager
+            nixpkgs.overlays = [ nanonote.overlays.default ];
+            # And then install it under "home.packages" in you Home-manager configuration
+
+            home-manager.useGlobalPkgs = true;
+            home-manager.useUserPackages = true;
+            home-manager.users.user = import ./home-manager.nix;
+
+          }
+      };
+    };
+  };
+}
+