UPDATE

.inscode

-run = "cowsay 欢迎来到 InsCode"
+run = "node index.js"
+
+entrypoint = "index.js"
 
 [nix]
 channel = "stable-22_11"

index.js

+console.log("欢迎来到 InsCode");
\ No newline at end of file

inscode.nix

 { pkgs }: {
-    deps = [
-        pkgs.cowsay
-    ];
-}
+	deps = [
+	  pkgs.nodejs-18_x
+      pkgs.nodePackages.typescript-language-server
+      pkgs.yarn
+	];
+}
\ No newline at end of file

package.json

+{
+    "name": "nodejs",
+    "version": "1.0.0",
+    "description": "",
+    "main": "index.js",
+    "scripts": {
+      "test": "echo \"Error: no test specified\" && exit 1"
+    },
+    "keywords": [],
+    "author": "",
+    "license": "ISC",
+    "dependencies": {
+      "@types/node": "^18.0.6",
+      "node-fetch": "^3.2.6"
+    }
+  }
+  
\ No newline at end of file