fix chmod if dir not exists in php 7.4

rootfs-php74/app/entrypoint.sh

@@ -79,7 +79,9 @@ if [ -f /ssh/authorized_keys ] ; then
   chown "${USERNAME}:${GROUPNAME}" /ssh/authorized_keys
 fi
 
-chmod 0700 "${WEBROOT}/.ssh"
+if [ -d "${PATH_WEBROOT}/.ssh" ] ; then
+  chmod 0700 "${PATH_WEBROOT}/.ssh"
+fi
 /usr/sbin/sshd -e
 
 cat > /etc/nginx/conf.d/user.conf <<EOF