init: dcrd, dcrwallet, and dcrctl at 2.0.6. init modules for dcrd and dcrwallet

Signed-off-by: stakeynet <git@stakey.net>

flake.nix

@@ -0,0 +1,43 @@
+{
+  description = ''
+    A collection of Nix packages and NixOS modules for easily
+    installing full-featured Decred nodes.
+  '';
+
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs = { self, nixpkgs }: let
+    supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
+    forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
+  in {
+    packages = forAllSystems (system: let
+      pkgs = nixpkgs.legacyPackages.${system};
+    in {
+      dcrd = pkgs.callPackage ./pkgs/dcrd.nix {};
+      dcrctl = pkgs.callPackage ./pkgs/dcrctl.nix {};
+      dcrwallet = pkgs.callPackage ./pkgs/dcrwallet.nix {};
+    });
+
+    overlays.default = final: prev: {
+      dcrd = final.callPackage ./pkgs/dcrd.nix {};
+      dcrctl = final.callPackage ./pkgs/dcrctl.nix {};
+      dcrwallet = final.callPackage ./pkgs/dcrwallet.nix {};
+    };
+
+    nixosModules = {
+      dcrd = ./modules/dcrd.nix;
+      dcrwallet = ./modules/dcrwallet.nix;
+      default = { config, lib, pkgs, ... }: {
+        imports = [
+          self.nixosModules.dcrd
+          self.nixosModules.dcrwallet
+        ];
+        nixpkgs.overlays = [ self.overlays.default ];
+      };
+    };
+  };
+}
+