diff --git a/setup.sh b/setup.sh
index 6cc4db0..5c7e10c 100755
--- a/setup.sh
+++ b/setup.sh
@@ -26,7 +26,7 @@ echo $PHOTOS
 
 # serve at what domain
 read -p "Na jaké doméně budou stránky? "
-DOMAIN=${REPLY?Musíte mít doménu}
+DOMAIN=${REPLY:?Musíte mít doménu}
 echo $DOMAIN
 
 # make config files
@@ -43,14 +43,5 @@ docker compose up -d
 usermod -a -G docker ubuntu
 
 # SSH
-cat >> /etc/ssh/sshd_config <<EOF
-LoginGraceTime 42
-MaxStartups 3
-PermitRootLogin no
-StrictModes yes
-MaxAuthTries 6
-MaxSessions 10
-PasswordAuthentication no
-PubkeyAuthentication yes
-AllowUsers ubuntu
-EOF
+sed -E 's/^.*PasswordAuthentication yes.*$/PasswordAuthentication no/' -i /etc/ssh/sshd_config
+echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIq7eEoXW6aUp5kdoG3YC6EulPH9SsSemDBzyv/Tofjr amogus" >> /home/ubuntu/.ssh/authorized_keys