Scaffolding for lab 5, add infracost

lab-5/README.md

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+# Lab 5
+
+Build an RDS Database (MySQL) within VPC
+
+## Tasks
+
+- [ ] Using Terraform, provision a private RDS MySQL 8.0 instance in the same VPC.
+Restrict access so only your EC2 (from Month 1) can connect on port 3306.
+
+## Map
+
+```mermaid
+```
+
+## Resources
+
+- https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/vpc
+- https://docs.aws.amazon.com/vpc/latest/userguide/vpc-cidr-blocks.html
+- [An Introduction to Networking Terminology, Interfaces, and Protocols](https://www.digitalocean.com/community/tutorials/an-introduction-to-networking-terminology-interfaces-and-protocols)
+- [Understanding IP Addresses, Subnets, and CIDR Notation for Networking](https://www.digitalocean.com/community/tutorials/understanding-ip-addresses-subnets-and-cidr-notation-for-networking)
+  
+## Terms
+
+- **CIDR blocks**: 
+- **IPv4 and IPv6**: