This tutorial guides on deploying a Strapi application as a Docker container in AWS Elastic Beanstalk, connected to PostgreSQL in Relational Database Service. To start, create a new project using the command `npx create-strapi-app my-project --template blog`, then configure the database connection to use PostgreSQL. Next, create two Dockerfiles for development and production environments, and use Docker-Compose to simplify the process of building and running multiple containers. After that, deploy the image in Elastic Beanstalk by creating a Dockerrun.aws.json file and uploading it to an S3 bucket. Finally, automate deployment using AWS CLI and GitHub Actions.