Add ssh key to known hosts and setup avahi daemon

stage4/06-meshcentral/00-run.sh

+#!/bin/bash -e
+
+# Add an authorized ssh key for MeshCentral deployment
+mkdir -p "${ROOTFS_DIR}/home/${FIRST_USER_NAME}/.ssh"
+echo 'ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBJZ1g3+sGOgRyd55VLYYGsnFYUJ1B/1c2gUUhzT2tRnfZ8MdsvdWwM/XVnlG3uhrm62ZgER0YqKf0xK163mvjNM= thymio' > "${ROOTFS_DIR}/home/${FIRST_USER_NAME}/.ssh/authorized_keys"
+
+# Setup avahi daemon so the pi can be found with avahi-browse on the network
+sed -i 's/^publish-workstation=no/publish-workstation=yes/' "${ROOTFS_DIR}/etc/avahi/avahi-daemon.conf"