fix ip address regex

Author: Adam-D-Lewis

variables.tf

@@ -31,13 +31,13 @@ variable "private_subnet_cidr" {
   type        = string
   default     = "10.0.0.0/24"
   validation {
-    condition     = can(regex("^[0-9]{1,2}.[0-9]{1,2}.[0-9]{1,2}.[0-9]{1,2}/[0-9]{1,2}$", var.private_subnet_cidr))
+    condition     = can(regex("^[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}/[0-9]{1,2}$", var.private_subnet_cidr))
     error_message = "Invalid CIDR format."
   }
 
   # Ensure CIDR is /26 or larger (See https://cloud.google.com/run/docs/configuring/vpc-direct-vpc#scale_down for more info)
   validation {
-    condition     = can(regex("^[0-9]{1,2}.[0-9]{1,2}.[0-9]{1,2}.[0-9]{1,2}/[0-9]{1,2}$", var.private_subnet_cidr)) && (tonumber(regex("[0-9]{1,2}$", var.private_subnet_cidr)) <= 26)
+    condition     = can(regex("^[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}/[0-9]{1,2}$", var.private_subnet_cidr)) && (tonumber(regex("[0-9]{1,2}$", var.private_subnet_cidr)) <= 26)
     error_message = "CIDR range must be /26 or larger (required by direct VPC egress)."
   }
 }