Infrastructure as code (#3)

* Moves website to website/

* Adds terraform gitignores

* Terraform with AWS provider

* Initialises Terraform

* Locals and variables for provider

* Fetches SSL certificate from ACM

* S3 static website bucket

* CloudFront distribution

* Route53 records

* Deployment workflow uses secret S3 bucket suffix

* Adds README

---------

Co-authored-by: Joe Carstairs <65492573+Sycamost@users.noreply.github.com>

infrastructure/variables.tf

@@ -0,0 +1,28 @@
+variable "aws_access_key" {
+  type        = string
+  sensitive   = true
+  description = "An AWS access key with permission to provision all relevant resources"
+}
+
+variable "aws_secret_key" {
+  type        = string
+  sensitive   = true
+  description = "The secret corresponding to the provided AWS access key"
+}
+
+variable "secret_s3_bucket_suffix" {
+  type        = string
+  sensitive   = true
+  description = "This string should be a long string of up to 54 random characters. It will be appended to the S3 bucket name to mitigate the risk of DDoS attacks."
+  nullable    = false
+
+  validation {
+    condition     = length(var.secret_s3_bucket_suffix) > 12
+    error_message = "This string should be at least 12 characters"
+  }
+
+  validation {
+    condition     = length(var.secret_s3_bucket_suffix) <= 54
+    error_message = "This string should be no more than 54 characters long"
+  }
+}