Make edge Docker installation opt-in

bootstrap/edge/main.tf

@@ -46,6 +46,7 @@ resource "null_resource" "edge_services" {
     host                = var.edge_host
     user                = var.edge_user
     install_dir         = var.edge_install_dir
+    install_docker      = tostring(var.edge_install_docker)
     server_name         = var.server_name
     server_names        = join(" ", local.server_names)
     certbot_domain_args = join(" ", [for name in local.server_names : "-d ${name}"])
@@ -105,6 +106,7 @@ resource "null_resource" "edge_services" {
 set -eu
 
 install_dir="${self.triggers.install_dir}"
+install_docker="${self.triggers.install_docker}"
 server_name="${self.triggers.server_name}"
 server_names="${self.triggers.server_names}"
 certbot_domain_args="${self.triggers.certbot_domain_args}"
@@ -144,7 +146,12 @@ if ! curl -sS --connect-timeout 10 "http://$gitea_backend_host:$gitea_backend_po
 fi
 
 if ! command -v docker >/dev/null 2>&1; then
+  if [ "$install_docker" = "true" ]; then
     curl -fsSL https://get.docker.com | sudo sh
+  else
+    echo "Docker is not installed on the edge host. Install Docker first, or set edge_install_docker=true to allow get.docker.com installation." >&2
+    exit 1
+  fi
 fi
 
 if ! sudo docker compose version >/dev/null 2>&1; then

bootstrap/edge/variables.tf

@@ -18,6 +18,11 @@ variable "edge_install_dir" {
   default = "/opt/homelab-edge"
 }
 
+variable "edge_install_docker" {
+  type    = bool
+  default = false
+}
+
 variable "server_name" {
   type    = string
   default = "lab2025.duckdns.org"