Add AWS execrises and questions

Mostly about VPC and Route 53.

exercises/aws/solutions/creating_records.md

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+## AWS Route 53 - Creating Records
+
+### Requirements
+
+At least one registered domain
+
+### Objectives
+
+1. Create the following record for your domain:
+  1. Record name: foo
+  2. Record type: A
+  3. Set some IP in the value field
+
+2. Verify from the shell that you are able to use the record you've created to lookup for the IP address by using the domain name
+
+### Solution
+
+1. Go to Route 53 service -> Hosted zones
+2. Click on your domain name
+3. Click on "Create record"
+4. Insert "foo" in "Record name"
+5. Set "Record type" to A
+6. In "Value" insert "201.7.20.22"
+7. Click on "Create records"
+
+1. In your shell, type `nslookup foo.<YOUR DOMAIN>` or `dig foo.<YOUR NAME`

exercises/aws/solutions/new_vpc.md

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+## AWS VPC - My First VPC
+
+### Objectives
+
+1. Create a new VPC
+  1. It should have a CIDR that supports using at least 60,000 hosts
+
+### Solution
+
+#### Console
+
+1. Under "Virtual Private Cloud" click on "Your VPCs"
+2. Click on "Create VPC"
+3. Insert a name (e.g. someVPC)
+4. Insert IPv4 CIDR block: 10.0.0.0/16
+5. Keep "Tenancy" at Default
+6. Click on "Create VPC"

exercises/aws/solutions/register_domain.md

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+## AWS Route 53 - Register Domain
+
+### Objectives
+
+Note: registering domain costs money. Don't do this exercise, unless you understand that you are going to register a domain and it's going to cost you money.
+
+1. Register your own custom domain using AWS Route 53
+2. What is the type of your domain?
+3. How many records your domain has?
+
+### Solution
+
+1. Go to Route 53 service page
+2. Click in the menu on "Registered Domains" under "Domains"
+3. Click on "Register Domain"
+4. Insert your domain
+5. Check if it's available. If it is, add it to the cart 
+
+Note: registering domain costs money. Don't click on "continue", unless you understand that you are going to register a domain and it's going to cost you money.
+
+6. Click on "Continue" and fill in your contact information
+7. Choose if you want to renew it in the future automatically. Accept the terms and click on "Complete Order"
+8. Go to hosted zones and you should see there your newly registered domain
+
+1. The domain type is "Public"
+
+1. The domain has 2 DNS records: NS and SOA

exercises/aws/solutions/subnets.md

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+## AWS VPC - Subnets
+
+### Requirements
+
+Single newly created VPC
+
+### Objectives
+
+1. Create a subnet in your newly created VPC
+  1. CIDR: 10.0.0.0/24
+  2. Name: NewSubnet1
+2. Create additional subnet
+  1. CIDR: 10.0.1.0/24
+  2. Name: NewSubnet2
+  3. Different AZ compared to previous subnet
+3. Create additional subnet
+  1. CIDR: 10.0.2.0/24
+  2. Name: NewSubnet3
+  3. Different AZ compared to previous subnets
+
+### Solution
+
+#### Console
+
+1. Click on "Subnets" under "Virtual Private Cloud"
+2. Make sure you filter by your newly created VPC (to not see the subnets in all other VPCs). You can do this in the left side menu
+3. Click on "Create subnet"
+4. Choose your newly created VPC
+5. Set the subnet name to "NewSubnet1"
+6. Choose AZ
+7. Set CIDR to 10.0.0.0/24
+8. Click on "Add new subnet"
+9. Set the subnet name to "NewSubnet2"
+10. Choose a different AZ
+11. Set CIDR to 10.0.1.0/24
+12. Click on "Add new subnet"
+13. Set the subnet name to "NewSubnet3"
+14. Choose a different AZ
+15. Set CIDR to 10.0.2.0/24