In order to provide scalability and fault tolerance you will be deploying your web front end behind a Lightsail load balancer. Lightsail load balancers handle both HTTP and HTTPS traffic on ports 80 and 443 respectively. For HTTPS you can request a free certificate from AWS certificate manager (although configuring HTTPS connections is out of scope for this workshop).
Return to the Lightsail console home page and choose Networking from the horizontal menu.
Click Create Load Balancer
Scroll down and enter todo-lb for the load balancer name
Click Create Load Balancer