Merge pull request #1207 from ckyrouac/reinstall-docs

reinstall: Add docs for system-reinstall-bootc

Author: cgwalters

docs/src/bootc-install.md

@@ -230,6 +230,13 @@ via a tool like `cloud-init`).  To do this, just add
 `--root-ssh-authorized-keys /target/root/.ssh/authorized_keys`
 to the above.
 
+
+### Using `system-reinstall-bootc`
+
+This is a separate binary included with bootc. It is an opinionated, interactive CLI that wraps `bootc install to-existing-root`. See [bootc install to-existing-root](Using-bootc-install-to-existing-root) for details on the installation operation.
+
+`system-reinstall-bootc` can be run from an existing Linux system. It will pull the supplied image, prompt to setup SSH keys for accessing the system, and run `bootc install to-existing-root` with all the bind mounts and SSH keys configured.
+
 ### Using `bootc install to-filesystem --source-imgref <imgref>`
 
 By default, `bootc install` has to be run inside a podman container. With this assumption,