feat: add url util function

- Add `urlJoin` for join url

utils/url.js

@@ -0,0 +1,19 @@
+const path = require('path');
+const _ = require('lodash');
+const { URL } = require('url');
+
+function urlJoin(subPath, baseUrl) {
+    let baseUrlSplit = _.compact(baseUrl.split('/'));
+    if ( baseUrlSplit.length > 2 ) {
+        let subPathInBaseUrl = baseUrlSplit.slice(2).join("/");
+        let newSubPath = path.join(subPathInBaseUrl, subPath);
+        let joinURL = new URL(newSubPath, baseUrl);
+        return joinURL.href;
+    } else {
+        let joinURL = new URL(subPath, baseUrl);
+        return joinURL.href;
+    }
+}
+
+
+module.exports.urlJoin = urlJoin;