added swagger ui download url to nix flake

flake.nix

@@ -21,6 +21,10 @@
         pkgs = import nixpkgs { inherit system overlays; };
         rust = pkgs.rust-bin.stable.latest.default;
         openssl = pkgs.openssl;
+        swaggerUiZip = pkgs.fetchurl {
+          url = "https://github.com/swagger-api/swagger-ui/archive/refs/tags/v5.17.14.zip";
+          hash = "sha256-SBJE0IEgl7Efuu73n3HZQrFxYX+cn5UU5jrL4T5xzNw=";
+        };
       in
       {
         packages.default = pkgs.rustPlatform.buildRustPackage {
@@ -37,12 +41,15 @@
           nativeBuildInputs = [
             rust
             pkgs.pkg-config
+            pkgs.curl
           ];
           buildInputs = [ openssl ];
 
           OPENSSL_LIB_DIR = "${openssl.out}/lib";
           OPENSSL_INCLUDE_DIR = "${openssl.dev}/include";
           PKG_CONFIG_PATH = "${openssl.dev}/lib/pkgconfig";
+
+          SWAGGER_UI_DOWNLOAD_URL = "file://${swaggerUiZip}";
         };
 
         devShells.default = pkgs.mkShell {
@@ -51,6 +58,7 @@
             pkgs.cargo
             pkgs.rust-analyzer
             pkgs.pkg-config
+            pkgs.curl
             openssl
           ];
           shellHook = ''