feat(datamart): intial setup to datamart migrations

backend/src/db/db.controller.ts

@@ -0,0 +1,16 @@
+import { drizzle } from "drizzle-orm/postgres-js";
+import postgres from "postgres";
+
+const dbURL = `postgres://${process.env.DATABASE_USER}:${process.env.DATABASE_PASSWORD}@${process.env.DATABASE_HOST}:${process.env.DATABASE_PORT}/${process.env.DATABASE_DB}`;
+
+const queryClient = postgres(dbURL, {
+	max: 10,
+	idle_timeout: 60,
+	connect_timeout: 30,
+	max_lifetime: 1000 * 6 * 5,
+	onnotice: (n) => {
+		console.info("PG notice: ", n.message);
+	},
+});
+
+export const db = drizzle({ client: queryClient });