feat: add healthcheck script for docker use

src/healthcheck.ts

@@ -0,0 +1,42 @@
+'use strict';
+
+/* eslint-disable no-console */
+import http from 'node:http';
+
+import config from 'config';
+
+const options = {
+	hostname: 'localhost',
+	port: config.get('port'),
+	path: '/actuator/health',
+	method: 'GET'
+};
+
+http
+	.request(options, (res) => {
+		let body = '';
+
+		res.on('data', (chunk) => {
+			body += chunk;
+		});
+
+		res.on('end', () => {
+			try {
+				const response = JSON.parse(body);
+				if (response.status === 'UP') {
+					process.exit(0);
+				}
+
+				console.log('Unhealthy response received: ', body);
+				process.exit(1);
+			} catch (err) {
+				console.log('Error parsing JSON response body: ', err);
+				process.exit(1);
+			}
+		});
+	})
+	.on('error', (err) => {
+		console.log('Error: ', err);
+		process.exit(1);
+	})
+	.end();