Docker TTL (#750)

## Description:

- Terminate docker containers in staging subdomains after 24 hours.
- Reduce worker count to 2 for these deployments.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

---------

Co-authored-by: Scott Anderson <662325+scottanderson@users.noreply.github.com>

src/core/configuration/PreprodConfig.ts

@@ -6,6 +6,9 @@ export const preprodConfig = new (class extends DefaultServerConfig {
     return GameEnv.Preprod;
   }
   numWorkers(): number {
+    if (process.env.SUBDOMAIN !== "main") {
+      return 2;
+    }
     return 3;
   }
   jwtAudience(): string {