don't go below 1 machine

Author: Ughuuu

fly.toml

@@ -13,7 +13,7 @@ primary_region = "lax"
   force_https = true
   auto_stop_machines = true
   auto_start_machines = true
-  min_machines_running = 0
+  min_machines_running = 1
   max_machines_running = 1
   processes = ["app"]