use node: prefix for requires

mostly because code is being autogenerated by all the AI stuff using
this prefix. it's also used in the stack trace.

src/iputils.js

@@ -5,7 +5,7 @@ exports = module.exports = {
     intFromIp
 };
 
-const assert = require('assert');
+const assert = require('node:assert');
 
 // this code is used in migrations - 20201120212726-apps-add-containerIp.js
 function intFromIp(address) {