Add terraform scripts to build nginx image (#4484)

build/images/nginx/variables.tf

@@ -0,0 +1,43 @@
+variable "access_key" {
+}
+
+variable "secret_key" {
+}
+
+variable "region" {
+  default = "us-west-2"
+}
+
+variable "cidr_vpc" {
+  description = "CIDR block for the VPC"
+  default     = "10.4.0.0/16"
+}
+
+variable "cidr_subnet" {
+  description = "CIDR block for the subnet"
+  default     = "10.4.0.0/24"
+}
+
+variable "availability_zone" {
+  description = "availability zone to create subnet"
+  default     = "us-west-2a"
+}
+
+variable "ssh_key_path" {
+  description = "Path to the SSH key"
+  default     = "~/.ssh/id_rsa"
+}
+
+variable "ssh_public_key_path" {
+  description = "Path to the public SSH key"
+  default     = "~/.ssh/id_rsa.pub"
+}
+
+variable "instance_type" {
+  description = "EC2 instance"
+  default     = "m5.16xlarge"
+}
+
+variable "project_tag" {
+  default = "kubernetes/ingress-nginx"
+}