Fix error message to reference example.env instead of example.dev.vars

Co-authored-by: ComputerEndProgram <93030074+ComputerEndProgram@users.noreply.github.com>

Author: Copilot

src/server-standalone.ts

@@ -35,7 +35,7 @@ if (missingEnvVars.length > 0) {
 	for (const varName of missingEnvVars) {
 		console.error(`  - ${varName}`);
 	}
-	console.error('\nPlease create a .env file based on example.dev.vars');
+	console.error('\nPlease create a .env file based on example.env');
 	process.exit(1);
 }