Added functionality for neo4js database

graph_db.js

@@ -0,0 +1,18 @@
+const neo4j = require('neo4j-driver');
+
+const URI = process.env.GRAPH_DB_URI;
+const USER = process.env.GRAPH_DB_USER;
+const PASSWORD = process.env.GRAPH_DB_PWD;
+
+const driver = neo4j.driver(URI, neo4j.auth.basic(USER, PASSWORD));
+
+(async () => {
+  try {
+    const serverInfo = await driver.getServerInfo();
+    console.log('Neo4j Connection established');
+  } catch (error) {
+    console.error('Neo4j Connection failed', error);
+  }
+})();
+
+module.exports = driver;