Moved off AWS. (#2)

- Instance in Hetzner.
- Data stored in Backblaze B2.

Reviewed-on: #2
Co-authored-by: M. V. Hutz <git@maximhutz.me>
Co-committed-by: M. V. Hutz <git@maximhutz.me>

terraform/providers.tf

@@ -1,11 +1,24 @@
 terraform {
-  # The backend is stored in an S3 bucket.
-  backend "s3" {}
+  backend "s3" {
+    skip_credentials_validation = true
+    skip_region_validation = true
+    skip_requesting_account_id = true
+  }
+
+  required_providers {
+    hcloud = {
+      source  = "hetznercloud/hcloud"
+      version = "~> 1.45"
+    }
+  }
+}
+
+provider "hcloud" {
+  token = var.hcloud_token
 }
 
-# Access AWS through the IaC roles.
 provider "aws" {
   region     = var.aws_region
-  access_key = var.aws_access
-  secret_key = var.aws_secret
+  access_key = var.aws_access_key
+  secret_key = var.aws_secret_key
 }