Provision AWS EC2 instance with userdata using Terraform

For this you will need ami, key_name, vpc_security_group_ids, subnet_id and user_data (provided below).

main.tf:

resource "aws_instance" "dev_node" {
  instance_type = "t3.nano"
  ami = data.aws_ami.server_ami.id
  key_name = aws_key_pair.mtc_auth.id
  vpc_security_group_ids = [aws_security_group.mtc_sg.id]
  subnet_id = aws_subnet.mtc_public_subnet.id
  user_data = file("userdata.tpl")

  root_block_device {
    volume_size = 10
  }

  tags = {
    Name = "dev-node"
  }
}

userdata.tpl:

#!/bin/bash
sudo apt update
sudo apt install apt-transport-https ca-certificates curl software-properties-common -y
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu  $(lsb_release -cs)  stable"
sudo apt update
sudo apt install docker-ce -y
sudo systemctl start docker
sudo systemctl enable docker
sudo groupadd docker
sudo usermod -aG docker ubuntu

Run plan, appy, check new created instance and connect to it