Fix start script: scope env vars to Next.js process only

start.sh

@@ -1,7 +1,10 @@
 #!/bin/bash
 
 # Start Next.js admin panel in background on port 3000
-cd /app/admin && node server.js &
+HOSTNAME="0.0.0.0" PORT=3000 node /app/admin/server.js &
 
-# Start Go API on port 5000 (Dokku's default)
-/app/api
+# Wait for Next.js to start
+sleep 3
+
+# Start Go API (uses PORT env from Dokku, defaults to 5000)
+exec /app/api