Add support for frontend app in express server

package.nix

@@ -1,16 +1,19 @@
 {
+  pkgs,
   buildNpmPackage,
   lib,
   ...
-}:
-buildNpmPackage {
-  pname = "actual-importer";
-  version = "0.0.1";
-  src = ./.;
-  npmDepsHash = "sha256-QqSZJuQLPll3qFi5Lv4kbQo+548l3VKgx073WLNXMsw=";
+}: let
+  frontend = pkgs.callPackage ./web/package.nix {};
+in
+  buildNpmPackage {
+    pname = "actual-importer";
+    version = "0.0.1";
+    src = ./.;
+    npmDepsHash = "sha256-ayfvTn8FVo7/K/Gy7oTDQiXDewvrU7B5JsNLHfrxibQ=";
 
-  postInstall = ''
-    mkdir -p $out/views
-    cp -r ${./views}/* $out/views/
-  '';
-}
+    postInstall = ''
+      mkdir -p $out/lib/node_modules/actual-importer/public
+      cp -r ${frontend}/lib/node_modules/web/dist/* $out/lib/node_modules/actual-importer/public/
+    '';
+  }