ops: Add 250ms delay between warm cache requests

production/nginx-cache-warmer

@@ -120,14 +120,16 @@ do for url in / \
 
 	do
 		warm "https://${hostname}${url}"
+		sleep 0.25 # wait 250ms between queries to not DoS mariadb
 	done
 
 	for slug in $slugs
 	do
 		warm "https://${hostname}/api/v1/mining/pool/${slug}"
+		sleep 0.25 # wait 250ms between queries to not DoS mariadb
 		warm "https://${hostname}/api/v1/mining/pool/${slug}/hashrate"
+		sleep 0.25 # wait 250ms between queries to not DoS mariadb
 		warm "https://${hostname}/api/v1/mining/pool/${slug}/blocks"
+		sleep 0.25 # wait 250ms between queries to not DoS mariadb
 	done
-
-	sleep 10
 done