status.staging: double size of DB hosts

Signed-off-by: Jakub Sokołowski <jakub@status.im>

workspaces.tf

@@ -38,7 +38,9 @@ locals {
       store_db_data_vol_size = 320
     }
     staging = {
-      /* Settings specific to the test fleet/workspace. */
+      db_do_type = "s-2vcpu-4gb"
+      db_ac_type = "ecs.t5-lc1m2.large"
+      db_gc_type = "c2d-highcpu-2"
     }
   }
 }