Refactor code structure for improved readability and maintainability

src/data-source.ts

@@ -0,0 +1,18 @@
+import { DataSource } from "typeorm";
+import { config } from "dotenv";
+
+// Load environment variables
+config();
+
+export default new DataSource({
+  type: "mariadb",
+  host: process.env.DB_HOST || "localhost",
+  port: parseInt(process.env.DB_PORT) || 3306,
+  username: process.env.DB_USERNAME || "root",
+  password: process.env.DB_PASSWORD || "",
+  database: process.env.DB_DATABASE || "low_code_engine",
+  entities: ["src/**/*.entity{.ts,.js}"],
+  migrations: ["src/migrations/*{.ts,.js}"],
+  synchronize: false,
+  logging: false,
+});