(DOCSP-7890): x509 node snippet fixes (#582)

* (DOCSP-7890): added node x509 connection snippet

* updated js file to add count documents

* (DOCSP-7890): mv const collection var collection & added await to collection.countDocuments

* (DOCSP-7890): fixed uri + passed in only sslKey and cert via client.pem

Author: Mohammad Hunan Chughtai

source/includes/connection-snippets/x509-snippets/node-connection.js

@@ -2,10 +2,11 @@
 const { MongoClient } = require('mongodb');
 const fs = require('fs');
 
-const client = new MongoClient('mongodb+srv://<cluster-url>?authMechanism=MONGODB-X509&ssl=true', {
-  sslCA: fs.readFileSync('/etc/certs/mongodb/ca.pem'),
-  sslKey: fs.readFileSync('/etc/certs/mongodb/client.pem'),
-  sslCert: fs.readFileSync('/etc/certs/mongodb/client.pem')
+const credentials = fs.readFileSync('/etc/certs/mongodb/client.pem');
+
+const client = new MongoClient('mongodb+srv://<cluster-url>/test?authSource=$external&retryWrites=true&w=majority&authMechanism=MONGODB-X509', {
+  sslKey: credentials,
+  sslCert: credentials
 });
 
 async function run() {