Passing ssh key via local file instead.

flatcar/Makefile

@@ -2,7 +2,7 @@
 ROOT_DIR:=$(shell dirname "$(realpath $(firstword $(MAKEFILE_LIST)))")
 
 ignition:
-	cat cl.yaml | sudo docker run --rm --volume ${ROOT_DIR}:/pwd --workdir /pwd -i quay.io/coreos/butane:latest -d /pwd > ignition.json
+	cat cl.yaml | sudo docker run --rm --volume /home/tjhintz/.ssh/id_rsa.pub:/pwd/ssh-keys --volume ${ROOT_DIR}:/pwd --workdir /pwd -i quay.io/coreos/butane:latest -d /pwd > ignition.json
 
 build:
 	cp --reflink=auto flatcar_production_qemu_image.img.fresh flatcar_production_qemu_image.img

flatcar/cl.yaml

@@ -3,8 +3,8 @@ version: 1.1.0
 passwd:
   users:
     - name: core
-      ssh_authorized_keys:
-        - ""
+      ssh_authorized_keys_local:
+        - /ssh-keys
 systemd:
   units:
     - name: var-lib-docker-volumes.mount