feat: #9957, don't remove existing fields form config.json

src/install.js

@@ -527,7 +527,16 @@ install.save = async function (server_conf) {
 		serverConfigPath = path.resolve(__dirname, '../', nconf.get('config'));
 	}
 
-	await fs.promises.writeFile(serverConfigPath, JSON.stringify(server_conf, null, 4));
+	let currentConfig = {};
+	try {
+		currentConfig = require(serverConfigPath);
+	} catch (err) {
+		if (err.code !== 'MODULE_NOT_FOUND') {
+			throw err;
+		}
+	}
+
+	await fs.promises.writeFile(serverConfigPath, JSON.stringify({ ...currentConfig, ...server_conf }, null, 4));
 	console.log('Configuration Saved OK');
 	nconf.file({
 		file: serverConfigPath,