fallocate swapfile instead of dd

fallocate swapfile instead of dd

diff --git a/discourse-setup b/discourse-setup
index c4f263b..69e6f58 100755
--- a/discourse-setup
+++ b/discourse-setup
@@ -139,7 +139,7 @@ check_disk_and_memory() {
       ## derived from https://meta.discourse.org/t/13880
       ##
       install -o root -g root -m 0600 /dev/null /swapfile
-      dd if=/dev/zero of=/swapfile bs=1k count=2048k
+      fallocate -l 2G /swapfile
       mkswap /swapfile
       swapon /swapfile
       echo "/swapfile       swap    swap    auto      0       0" | tee -a /etc/fstab

GitHub sha: 72a7bdf0