feat(nix): build UTRP (#714)

* feat(nix): build UTRP

* feat(nix): set fixed rev and sha256 + update lock file

* chore(nix): remove systems input

* chore: format

* chore(nix): add meta attribute

* feat(nix): add doprz as a maintainer

nix/packages.nix

@@ -0,0 +1,40 @@
+{ inputs, ... }:
+{
+  perSystem =
+    { pkgs, ... }:
+    let
+      packageJson = builtins.fromJSON (builtins.readFile ../package.json);
+      gitRev = inputs.self.shortRev or inputs.self.dirtyShortRev or "dev";
+      gitBranch = if inputs.self ? ref then inputs.self.ref else "unknown";
+      baseVersion = packageJson.version;
+
+      commonArgs = {
+        inherit gitRev gitBranch;
+      };
+
+      # Prod variant
+      ut-registration-plus = pkgs.callPackage ./package.nix (
+        commonArgs
+        // {
+          version = "${baseVersion}+git.${gitRev}";
+          buildScript = "build";
+        }
+      );
+
+      # Dev variant
+      ut-registration-plus-dev = pkgs.callPackage ./package.nix (
+        commonArgs
+        // {
+          version = "${baseVersion}-dev+git.${gitRev}";
+          buildScript = "build:dev";
+        }
+      );
+    in
+    {
+      packages = {
+        inherit ut-registration-plus ut-registration-plus-dev;
+        default = ut-registration-plus;
+        dev = ut-registration-plus-dev;
+      };
+    };
+}