chore: add db dependency and check for env DB_URL

apps/express-template/package.json

@@ -15,6 +15,7 @@
 		"preset": "@repo/jest-presets/node"
 	},
 	"dependencies": {
+		"@repo/db": "*",
 		"@repo/logger": "*",
 		"body-parser": "^1.20.3",
 		"cors": "^2.8.5",

apps/next-template/package.json

@@ -14,6 +14,7 @@
 	"dependencies": {
 		"@clerk/nextjs": "^6.22.0",
 		"@repo/logger": "*",
+		"@repo/db": "*",
 		"@repo/ui": "*",
 		"next": "^15.3.0",
 		"react": "^18.3.1",

packages/db/src/database.ts

@@ -4,6 +4,10 @@ import dotenv from "dotenv";
 dotenv.config({ path: ".env" });
 
 let db_url = process.env.DATABASE_URL!;
+if (!db_url) {
+	throw new Error("DATABASE_URL is not set in environment variables.");
+}
+
 try {
 	db_url = decodeURI(db_url);
 } catch {