Add backup policy to be set as daily or weekly

Signed-off-by: Jason Rothstein <fdragon@fdragon.org>

resource.digitalocean_droplet.this.tf

@@ -1,5 +1,10 @@
 resource "digitalocean_droplet" "this" {
   backups    = "true"
+  backup_policy {
+    plan    = var.backup_policy_plan
+    weekday = var.backup_policy_weekday
+    hour    = var.backup_policy_hour
+  }
   image      = var.image_name
   ipv6       = "true"
   lifecycle {

variable.backup_policy_hour.tf

@@ -0,0 +1,5 @@
+variable "backup_policy_hour" {
+  # UTC Hour : 0, 4, 8, 12, 16, 20
+  default = "0"
+  type    = string
+}

variable.backup_policy_plan.tf

@@ -0,0 +1,5 @@
+variable "backup_policy_plan" {
+  # daily or weekly
+  default = "weekly"
+  type    = string
+}

variable.backup_policy_weekday.tf

@@ -0,0 +1,5 @@
+variable "backup_policy_weekday" {
+  # SUN, MON, TUE, WED, THU, FRI, SAT
+  default = "SUN"
+  type    = string
+}