check for undefined

src/lib/server/discord.ts

@@ -17,7 +17,7 @@ export async function sendContactMessage(name: string, email: string, message: s
 	form.append('content', content);
 
 	if (!env.DISCORD_CONTACT_WEBHOOK) {
-		return;
+		throw new Error('Undefined discord webhook');
 	}
 	const url = new URL(env.DISCORD_CONTACT_WEBHOOK);