Add ssh key for dev rootfs

Author: iKapitonau

meta-secret-vm/recipes-core/images/secret-vm-rootfs-common-dev.inc

@@ -1,5 +1,5 @@
 IMAGE_INSTALL += " sshd"
-ROOTFS_POSTPROCESS_COMMAND += "add_env;"
+ROOTFS_POSTPROCESS_COMMAND += "add_env; configure_dropbear;"
 
 add_env() {
     install -d ${IMAGE_ROOTFS}/usr/lib/systemd/system/secret-vm-startup.service.d
@@ -8,3 +8,9 @@ add_env() {
 Environment="DEBUG=true"
 EOF
 }
+
+configure_dropbear() {
+    install -d ${IMAGE_ROOTFS}/home/root/.ssh
+    echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIN3xIQcDeeqTejNHMAFr+nYpd7BJC3xnR1881hGE5L/I [email protected]" > ${IMAGE_ROOTFS}/home/root/.ssh/authorized_keys
+    echo 'DROPBEAR_EXTRA_ARGS=" -B -s"' > ${IMAGE_ROOTFS}/etc/default/dropbear
+}