Update readmes for modules 1-3

03-basics/README.md

@@ -1,4 +1,45 @@
-1) Create account credentials
+## 03 - Basics
 
+## Remote Backends
 
+Remote backends enable storage of TF state in a remote, location to enable secure collaboration.
 
+### Terraform Cloud
+
+https://www.terraform.io/cloud
+
+`./terraform-cloud-backend/main.tf`
+
+### AWS S3 + Dynamo DB
+
+Steps to initialize backend in AWS and manage it with Terraform:
+
+1) Use config from `./aws-backend/` (init, plan, apply) to provision s3 bucket and dynamoDB table with local state
+2) Uncomment the remote backend configuration
+3) Reinitialize with `terraform init`:
+
+```
+Do you want to copy existing state to the new backend?
+  Pre-existing state was found while migrating the previous "local" backend to the
+  newly configured "s3" backend. No existing state was found in the newly
+  configured "s3" backend. Do you want to copy this state to the new "s3"
+  backend? Enter "yes" to copy and "no" to start with an empty state.
+
+  Enter a value: yes 
+```
+
+Now the S3 bucket and dynamoDB table are mam and are able to be used as the state backend!
+
+## Web-App
+
+Generic web application architecture including:
+- EC2 instances
+- S3 bucket
+- RDS instance
+- Load balancer
+- Route 53 DNS config
+
+This example will be refined and improved in later modules.
+
+## Architecture
+![](./web-app/architecture.png)