fix: Add amazon provided dns to ecs instances

[jongwooo]

This pull request introduces new resources to configure DHCP options for the VPC in the Modules/Networking/main.tf file. These changes enhance the VPC's DNS and domain name configuration.

Added DHCP Options Configuration:

• aws_vpc_dhcp_options Resource: Configures DHCP options for the VPC, including setting the domain name to ec2.internal and using AmazonProvidedDNS as the domain name servers. Tags the resource with the name dutymate-dhcp-options.
• aws_vpc_dhcp_options_association Resource: Associates the newly created DHCP options with the existing VPC.

[Copilot]

Pull Request Overview

This PR adds VPC DHCP options and associates them to enable AmazonProvidedDNS in the Networking module.

• Introduces an aws_vpc_dhcp_options resource with ec2.internal domain and AmazonProvidedDNS servers
• Adds an aws_vpc_dhcp_options_association to link the new DHCP options with the existing VPC

Comments suppressed due to low confidence (2)

Modules/Networking/main.tf:59

• [nitpick] The resource name dhcp_options is generic; consider renaming it to vpc_dhcp_options for clearer intent and consistency with other resource names.

resource "aws_vpc_dhcp_options" "dhcp_options" {

Modules/Networking/main.tf:68

• [nitpick] The association block uses an abbreviated name dhcp_options_assoc; consider renaming to dhcp_options_association to match the resource type.

resource "aws_vpc_dhcp_options_association" "dhcp_options_assoc" {

[Copilot]

Hardcoding the domain name may reduce flexibility across environments; consider exposing domain_name (and domain_name_servers) as input variables.