Update indexer.md
Add missing instantiation of indexer in JS example.
@@ -22,9 +22,12 @@ The Indexer provides a set of REST API calls for searching blockchain Transactio
// verify installed version
// npm list algosdk
const algosdk = require('algosdk');
+
const indexer_token = "";
const indexer_server = "http://localhost";
const indexer_port = 8980;
+
+const indexerClient = new algosdk.Indexer(indexer_token, indexer_server, indexer_port);
```
```python tab="Python"
