feat: add sub module to create network for atlantis

modules/network/README.md

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+## Requirements
+
+| Name | Version |
+|------|---------|
+| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.6 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 5.5.0 |
+
+## Providers
+
+| Name | Version |
+|------|---------|
+| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 5.5.0 |
+
+## Modules
+
+No modules.
+
+## Resources
+
+| Name | Type |
+|------|------|
+| [aws_internet_gateway.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/internet_gateway) | resource |
+| [aws_route.public_1](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/route) | resource |
+| [aws_route.public_2](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/route) | resource |
+| [aws_route_table.private_1](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/route_table) | resource |
+| [aws_route_table.private_2](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/route_table) | resource |
+| [aws_route_table.public_1](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/route_table) | resource |
+| [aws_route_table.public_2](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/route_table) | resource |
+| [aws_route_table_association.private_1](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/route_table_association) | resource |
+| [aws_route_table_association.private_2](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/route_table_association) | resource |
+| [aws_route_table_association.public_1](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/route_table_association) | resource |
+| [aws_route_table_association.public_2](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/route_table_association) | resource |
+| [aws_subnet.private_1](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/subnet) | resource |
+| [aws_subnet.private_2](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/subnet) | resource |
+| [aws_subnet.public_1](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/subnet) | resource |
+| [aws_subnet.public_2](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/subnet) | resource |
+| [aws_vpc.main](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/vpc) | resource |
+
+## Inputs
+
+| Name | Description | Type | Default | Required |
+|------|-------------|------|---------|:--------:|
+| <a name="input_availability_zones"></a> [availability\_zones](#input\_availability\_zones) | List of Availability zone where the subnet must reside. | `list(string)` | <pre>[<br>  "us-east-1a",<br>  "us-east-1b"<br>]</pre> | no |
+| <a name="input_private_subnet_cidrs"></a> [private\_subnet\_cidrs](#input\_private\_subnet\_cidrs) | List of IPv4 CIDR block for private subnets. | `list(string)` | <pre>[<br>  "10.0.3.0/24",<br>  "10.0.4.0/24"<br>]</pre> | no |
+| <a name="input_public_subnet_cidrs"></a> [public\_subnet\_cidrs](#input\_public\_subnet\_cidrs) | List of IPv4 CIDR block for public subnets. | `list(string)` | <pre>[<br>  "10.0.1.0/24",<br>  "10.0.2.0/24"<br>]</pre> | no |
+| <a name="input_vpc_cidr_block"></a> [vpc\_cidr\_block](#input\_vpc\_cidr\_block) | (Optional) The IPv4 CIDR block for the VPC. | `string` | `"10.0.0.0/16"` | no |
+
+## Outputs
+
+| Name | Description |
+|------|-------------|
+| <a name="output_private_subnet_ids"></a> [private\_subnet\_ids](#output\_private\_subnet\_ids) | The ID of the private subnets. |
+| <a name="output_public_subnet_ids"></a> [public\_subnet\_ids](#output\_public\_subnet\_ids) | The ID of the public subnets. |
+| <a name="output_vpc_cidr_block"></a> [vpc\_cidr\_block](#output\_vpc\_cidr\_block) | CIDR block range of the VPC |
+| <a name="output_vpc_id"></a> [vpc\_id](#output\_vpc\_id) | The ID of VPC. |

modules/network/locals.tf

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+locals {
+  vpc_name                   = "atlantis-ecs-vpc"
+  public_1_subnet_name       = "atlantis-ecs-vpc-public-subnet-1"
+  private_1_subnet_name      = "atlantis-ecs-vpc-private-subnet-1"
+  private_1_route_table_name = "atlantis-ecs-vpc-private-route-table-1"
+  public_1_route_table_name  = "atlantis-ecs-vpc-public-route-table-1"
+  public_2_subnet_name       = "atlantis-ecs-vpc-public-subnet-2"
+  private_2_subnet_name      = "atlantis-ecs-vpc-private-subnet-2"
+  private_2_route_table_name = "atlantis-ecs-vpc-private-route-table-2"
+  public_2_route_table_name  = "atlantis-ecs-vpc-public-route-table-2"
+  igw_name                   = "atlantis-ecs-vpc-internet-gateway"
+}

modules/network/main.tf

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+provider "aws" {
+  region = "us-east-1"
+}
+
+resource "aws_vpc" "main" {
+  cidr_block = var.vpc_cidr_block
+  tags = {
+    Name = local.vpc_name
+  }
+}
+
+resource "aws_internet_gateway" "this" {
+  vpc_id = aws_vpc.main.id
+  tags = {
+    Name = local.igw_name
+  }
+}
+
+
+resource "aws_route" "public_1" {
+  route_table_id         = aws_route_table.public_1.id
+  destination_cidr_block = "0.0.0.0/0"
+  gateway_id             = aws_internet_gateway.this.id
+}
+
+
+resource "aws_subnet" "public_1" {
+  cidr_block        = var.public_subnet_cidrs[0]
+  vpc_id            = aws_vpc.main.id
+  availability_zone = var.availability_zones[1]
+  tags = {
+    Name = local.public_1_subnet_name
+  }
+}
+
+resource "aws_route_table" "public_1" {
+  vpc_id = aws_vpc.main.id
+  tags = {
+    Name = local.public_1_route_table_name
+  }
+}
+
+resource "aws_route_table_association" "public_1" {
+  subnet_id      = aws_subnet.public_1.id
+  route_table_id = aws_route_table.public_1.id
+}
+
+resource "aws_route" "public_2" {
+  route_table_id         = aws_route_table.public_2.id
+  destination_cidr_block = "0.0.0.0/0"
+  gateway_id             = aws_internet_gateway.this.id
+}
+
+resource "aws_subnet" "public_2" {
+  cidr_block        = var.public_subnet_cidrs[1]
+  vpc_id            = aws_vpc.main.id
+  availability_zone = var.availability_zones[1]
+  tags = {
+    Name = local.public_2_subnet_name
+  }
+}
+
+resource "aws_route_table" "public_2" {
+  vpc_id = aws_vpc.main.id
+  tags = {
+    Name = local.public_2_route_table_name
+  }
+}
+
+resource "aws_route_table_association" "public_2" {
+  subnet_id      = aws_subnet.public_2.id
+  route_table_id = aws_route_table.public_2.id
+}
+
+resource "aws_subnet" "private_1" {
+  cidr_block        = var.private_subnet_cidrs[0]
+  vpc_id            = aws_vpc.main.id
+  availability_zone = var.availability_zones[0]
+  tags = {
+    Name = local.private_1_subnet_name
+  }
+}
+
+resource "aws_route_table" "private_1" {
+  vpc_id = aws_vpc.main.id
+  tags = {
+    Name = local.private_1_route_table_name
+  }
+}
+
+resource "aws_route_table_association" "private_1" {
+  subnet_id      = aws_subnet.private_1.id
+  route_table_id = aws_route_table.private_1.id
+}
+
+
+resource "aws_subnet" "private_2" {
+  cidr_block        = var.private_subnet_cidrs[1]
+  vpc_id            = aws_vpc.main.id
+  availability_zone = var.availability_zones[0]
+  tags = {
+    Name = local.private_2_subnet_name
+  }
+}
+
+resource "aws_route_table" "private_2" {
+  vpc_id = aws_vpc.main.id
+  tags = {
+    Name = local.private_2_route_table_name
+  }
+}
+
+resource "aws_route_table_association" "private_2" {
+  subnet_id      = aws_subnet.private_2.id
+  route_table_id = aws_route_table.private_2.id
+}

modules/network/outputs.tf

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+output "vpc_id" {
+  description = "The ID of VPC."
+  value       = aws_vpc.main.id
+}
+
+output "public_subnet_ids" {
+  description = "The ID of the public subnets."
+  value       = [aws_subnet.public_1.id, aws_subnet.public_2.id]
+}
+
+output "private_subnet_ids" {
+  description = "The ID of the private subnets."
+  value       = [aws_subnet.private_1.id, aws_subnet.private_2.id]
+}
+
+output "vpc_cidr_block" {
+  description = "CIDR block range of the VPC"
+  value       = aws_vpc.main.cidr_block
+}

modules/network/variables.tf

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+variable "vpc_cidr_block" {
+  description = "(Optional) The IPv4 CIDR block for the VPC."
+  type        = string
+  default     = "10.0.0.0/16"
+}
+
+variable "public_subnet_cidrs" {
+  description = "List of IPv4 CIDR block for public subnets."
+  type        = list(string)
+  default     = ["10.0.1.0/24", "10.0.2.0/24"]
+}
+
+variable "private_subnet_cidrs" {
+  description = "List of IPv4 CIDR block for private subnets."
+  type        = list(string)
+  default     = ["10.0.3.0/24", "10.0.4.0/24"]
+}
+
+variable "availability_zones" {
+  description = "List of Availability zone where the subnet must reside."
+  type        = list(string)
+  default     = ["us-east-1a", "us-east-1b"]
+}

modules/network/versions.tf

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+terraform {
+  required_version = ">= 1.6"
+
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = ">= 5.5.0"
+    }
+  }
+}