add db connection check function

server.ts

@@ -4,6 +4,7 @@ import * as http from 'http';
 import app from './app';
 import { version } from './package.json';
 import ErrnoException = NodeJS.ErrnoException;
+import checkDatabaseConnection from './utils/prisma';
 
 // Initialise globals
 global.config = config;
@@ -26,6 +27,11 @@ server.listen(port);
 server.on('error', onError);
 server.on('listening', onListening);
 
+/**
+ * Checks if DB is connected
+ */
+void checkDatabaseConnection();
+
 /**
  * Event listener for HTTP server "error" event.
  */

utils/prisma.ts

@@ -0,0 +1,15 @@
+import prisma from '../prisma/prisma';
+
+async function checkDatabaseConnection(): Promise<void> {
+  try {
+    await prisma.$connect();
+    logger.error('Database connected.');
+  } catch (error) {
+    logger.error('Database connection failed:', error);
+    process.exit(1);
+  } finally {
+    await prisma.$disconnect();
+  }
+}
+
+export default checkDatabaseConnection;