Add nanopos package and module and make clightning service

pkgs/nanopos.nix

@@ -0,0 +1,33 @@
+{pkgs ? import <nixpkgs> {
+    inherit system;
+  }, system ? builtins.currentSystem, nodejs ? pkgs."nodejs-8_x"}:
+
+
+with pkgs;
+let
+ d1 = stdenv.mkDerivation {
+    name = "nanotip-sources";
+    src = fetchurl {
+      url = "https://registry.npmjs.org/nanopos/-/nanopos-0.1.3.tgz";
+      sha256 = "602d250190d4991b288ed7c493226bcbf03e73181f5d4d54d34334404fc06bb6";
+    };
+
+    buildInputs = [ nodePackages.node2nix git ];
+
+    unpackPhase = ''
+      mkdir -p $out
+      tar -xzf $src -C $out
+    '';
+
+    installPhase = ''
+      mkdir -p $out
+      cd $out/package
+      ${nodePackages.node2nix}/bin/node2nix -8 package.json
+    '';
+  };
+  # import from derivation (IFD)
+  packages = import (d1 + "/package/default.nix") {
+    inherit pkgs system;
+  };
+in
+packages