adjust node group to always have 1 node at market price, health check to use curl now

Signed-off-by: Irving Popovetsky <irving@popovetsky.com>

Author: irvingpop

terraform/asg.tf

@@ -21,7 +21,7 @@ module "autoscaling" {
   # Mixed Instances Policy for better availability
   mixed_instances_policy = {
     instances_distribution = {
-      on_demand_base_capacity                  = 0
+      on_demand_base_capacity                  = 1
       on_demand_percentage_above_base_capacity = 0
       spot_allocation_strategy                 = "capacity-optimized"
     }

terraform/python_backend/main.tf

@@ -54,7 +54,7 @@ resource "aws_ecs_task_definition" "python_backend" {
       }
 
       healthCheck = {
-        command     = ["CMD-SHELL", "wget -q -O /dev/null http://localhost:8000/healthz"]
+        command     = ["CMD-SHELL", "curl -f -s -o /dev/null http://localhost:8000/healthz"]
         interval    = 30
         timeout     = 5
         retries     = 3