scripts: sysinit: accept apt questions

Do not interactively request confirmation of packet installations

scripts/sysinit.sh

@@ -29,7 +29,7 @@ AUTHKEYFILE="${HOME}/.ssh/authorized_keys"
 
 # Install ssh-server
 sudo apt-get update
-sudo apt-get install openssh-server
+sudo apt-get -y install openssh-server
 
 # Configure public key
 # Make sure user's ssh config dir exist
@@ -43,5 +43,5 @@ if [[ ! -f "$AUTHKEYFILE"  ]] || ! grep -q "$KEY" "$AUTHKEYFILE"; then
 fi
 
 # Install spice-vdagent
-sudo apt-get install spice-vdagent
+sudo apt-get -y install spice-vdagent