Add DNS setup for load balancer

doc/install/aws/index.md

@@ -317,6 +317,20 @@ After the Load Balancer is up and running, you can revisit your Security
 Groups to refine the access only through the ELB and any other requirements
 you might have.
 
+### Configure DNS for Load Balancer
+
+On the Route 53 dashboard, click **Hosted zones** in the left navigation bar:
+
+1. Select an existing hosted zone or, if you do not already have one for your domain, click **Create Hosted Zone**, enter your domain name, and click **Create**.
+1. Click **Create Record Set** and provide the following values:
+    1. **Name:** Use the domain name (the default value) or enter a subdomain.
+    1. **Type:** Select **A - IPv4 address**.
+    1. **Alias Target:** Find the **ELB Classic Load Balancers** section and select the classic load balancer we created earlier.
+    1. **Routing Policy:** We'll use **Simple** but you can choose a different policy based on your use case.
+    1. **Evaluate Target Health:** We'll set this to **No** but you can choose to have the load balancer route traffic based on target health.
+    1. Click **Create**.
+1. Update your DNS records with your domain registrar. The steps for doing this vary depending on which registrar you use and is beyond the scope of this guide.
+
 ## Deploying GitLab inside an auto scaling group
 
 We'll use AWS's wizard to deploy GitLab and then SSH into the instance to