Make TLS optional when certs don't exist

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/server/index.tsx

@@ -22,12 +22,16 @@ app.get('/ggwave.js', () =>
 
 startup(PORT)
 
+const hasCerts = await Bun.file('./certs/cert.pem').exists()
+
 export default {
   ...app.defaults,
   port: PORT,
   idleTimeout: 255,
+  ...(hasCerts && {
     tls: {
       key: Bun.file('./certs/key.pem'),
       cert: Bun.file('./certs/cert.pem'),
     },
+  }),
 }