docs: add Terraform certification notes and tasks

terraform/007/main.tf

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+# terraform {
+#   required_providers {
+#     aws = {
+#       source  = "hashicorp/aws"
+#       version = "~> 6.0"
+#     }
+#     tls = {
+#       source  = "hashicorp/tls"
+#       version = "~> 4.0"
+#     }
+#   }
+# }
+
+# provider "aws" {
+#   region = "us-east-1"
+# }
+
+# --- New RSA key pair ---
+resource "tls_private_key" "devops_kp" {
+  algorithm = "RSA"
+  rsa_bits  = 4096
+}
+
+resource "aws_key_pair" "devops_kp" {
+  key_name   = "devops-kp"
+  public_key = tls_private_key.devops_kp.public_key_openssh
+}
+
+# --- Default VPC + its default security group ---
+data "aws_vpc" "default" {
+  default = true
+}
+
+data "aws_security_group" "default" {
+  vpc_id = data.aws_vpc.default.id
+  name   = "default"
+}
+
+# --- EC2 instance ---
+resource "aws_instance" "devops_ec2" {
+  ami                    = "ami-0c101f26f147fa7fd"
+  instance_type          = "t2.micro"
+  key_name               = aws_key_pair.devops_kp.key_name
+  vpc_security_group_ids = [data.aws_security_group.default.id]
+
+  credit_specification {
+    cpu_credits = "standard"
+  }
+
+  tags = {
+    Name = "devops-ec2"
+  }
+}

terraform/007/task-7.md

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+The Nautilus DevOps team is strategizing the migration of a portion of their infrastructure to the AWS cloud. Recognizing the scale of this undertaking, they have opted to approach the migration in incremental steps rather than as a single massive transition. To achieve this, they have segmented large tasks into smaller, more manageable units.
+
+For this task, create an EC2 instance using Terraform with the following requirements:
+
+The EC2 instance must use the value devops-ec2 as its Name tag, which defines the instance name in AWS.
+
+Use the Amazon Linux ami-0c101f26f147fa7fd to launch this instance.
+
+The Instance type must be t2.micro.
+
+Create a new RSA key named devops-kp.
+
+Attach the default (available by default) security group.
+
+The Terraform working directory is /home/bob/terraform. Create the main.tf file (do not create a different .tf file) to provision the instance.
+
+Note: Right-click under the EXPLORER section in VS Code and select Open in Integrated Terminal to launch the terminal.