In the previous chapter, you established a robust development environment by securely accessing your EC2 instance through SSH with VSCode and installing essential tools such as Docker, Docker Compose, GitHub, and Python with a virtual environment. You also deployed a simple HTTP application using Streamlit. In this chapter, you'll further improve the security, scalability, and reliability of your infrastructure by introducing a load balancer. You'll learn to create and configure an AWS Network Load Balancer, establish multiple target groups for different application services, adjust security groups to manage secure access, and deploy a Streamlit application accessible through the load balancer.