Before we build the application, we need to prepare a server. Our taskagile.com server is an instance of Amazon EC2. Its operating system is Amazon Linux 2 AMI. Its type is t2.micro. MySQL, RabbitMQ, and NGINX are installed manually on the same box. The mail server is the pre-installed Postfix. During the launching of the EC2 instance, we will also need to open port 80 and port 443 by adding inbound rules. For more details on how to do that, you can check Amazon AWS's user guide.