add terraform config files

terraform/vpc.tf

@@ -0,0 +1,35 @@
+provider "aws" {
+    region = var.region
+}
+
+data "aws_availability_zones" "available" {}
+
+module "myapp-vpc" {
+    source = "terraform-aws-modules/vpc/aws"
+    version = "2.64.0"
+
+    name = "myapp-vpc"
+    cidr = var.vpc_cidr_block
+    private_subnets = var.private_subnet_cidr_blocks
+    public_subnets = var.public_subnet_cidr_blocks
+    azs = data.aws_availability_zones.available.names 
+    
+    enable_nat_gateway = true
+    single_nat_gateway = true
+    enable_dns_hostnames = true
+
+    tags = {
+        "kubernetes.io/cluster/${var.cluster_name}" = "shared"
+    }
+
+    public_subnet_tags = {
+        "kubernetes.io/cluster/${var.cluster_name}" = "shared"
+        "kubernetes.io/role/elb" = 1 
+    }
+
+    private_subnet_tags = {
+        "kubernetes.io/cluster/${var.cluster_name}" = "shared"
+        "kubernetes.io/role/internal-elb" = 1
+    }
+
+}