Enable project and volume usage to be optional, off by default, unless the use_project and use_volume variables are set to a positive number

data.digitalocean_project.this.tf

@@ -1,3 +1,4 @@
 data "digitalocean_project" "this" {
-  name = var.project
+  count = var.use_project > 0 ? 1 : 0
+  name  = var.project
 }

resource.digitalocean_project_resources.this.tf

@@ -1,5 +1,6 @@
 resource "digitalocean_project_resources" "this" {
-  project = data.digitalocean_project.this.id
+  count   = var.use_project > 0 ? 1 : 0
+  project = data.digitalocean_project.this[0].id
   resources = [
     digitalocean_droplet.this.urn
   ]

resource.digitalocean_volume.this.tf

@@ -1,8 +1,7 @@
 resource "digitalocean_volume" "this" {
-  count                   = var.volume_size > 1 ? 1 : 0
-  description             = "Data Volume for ${var.host_name}.${var.domain_name}"
-  initial_filesystem_type = "ext4"
-  name                    = var.host_name
-  region                  = var.region
-  size                    = var.volume_size
+  count       = var.use_volume > 0 ? 1 : 0
+  description = "Data Volume for ${var.host_name}.${var.domain_name}"
+  name        = var.host_name
+  region      = var.region
+  size        = var.volume_size
 }

resource.digitalocean_volume_attachment.this.tf

@@ -1,5 +1,5 @@
 resource "digitalocean_volume_attachment" "this" {
-  count      = var.volume_size > 0 ? 1 : 0
+  count      = var.use_volume > 0 ? 1 : 0
   droplet_id = digitalocean_droplet.this.id
   volume_id  = digitalocean_volume.this[0].id
 }

variable.use_project.tf

@@ -0,0 +1,4 @@
+variable "use_project" {
+  default = 0
+  type    = number
+}

variable.use_volume.tf

@@ -0,0 +1,4 @@
+variable "use_volume" {
+  default = 0
+  type    = number
+}

variable.volume_size.tf

@@ -1,4 +1,4 @@
 variable "volume_size" {
-  default = "0"
+  default = 0
   type    = number
 }