Eksctl install link fix (#151)

* updated broken link for eksctl install

* added '.DS_Store' to the git ignore for mac users

Author: projectLewis

.gitignore

@@ -1 +1,2 @@
 .terraform/
+.DS_Store

SETUP.md

@@ -5,6 +5,6 @@ Greetings! Much of Operation Code's web site runs in a [Kubernetes](https://kube
 # Getting access to the cluster
 
 1. Ensure you have AWS access, and the aws CLI is operating correctly
-2. Install eksctl: https://eksctl.io/introduction/installation/
+2. Install eksctl: https://eksctl.io/introduction/#installation
 3. Run: `eksctl utils write-kubeconfig --region us-east-2 --cluster operationcode-backend`
 4. Verify everything works: `kubectl get namespaces`