3th of 3 Questions.
How to build an AMI?
Creating a Custom AMI
Building a custom AMI allows you to bake your software and configurations into a template, enabling faster scaling and consistent deployments. The most common method is creating an image from an existing running or stopped EC2 instance.
Steps to Create an AMI
Launch an EC2 instance from a base AMI and configure it (install software, updates, etc.).
In the EC2 Console, select the instance and choose Actions > Image and templates > Create image.
Provide an image name and description.
Configure volume settings and choose whether to reboot the instance (reboot is recommended for data integrity).
Once the AMI status is 'available', you can use it to launch new identical instances.
AWS CLI Command to Create Image