Update linuxkit container image naming: (#224)

## Description

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After pushing images was fixed, the naming of the images needed updated
to match the existing `hook-*` naming schema.

## Why is this needed

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Fixes: #

## How Has This Been Tested?
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<!--- Include details of your testing environment, and the tests you ran
to -->
<!--- see how your change affects other areas of the code, etc. -->


## How are existing users impacted? What migration steps/scripts do we
need?

<!--- Fixes a bug, unblocks installation, removes a component of the
stack etc -->
<!--- Requires a DB migration script, etc. -->


## Checklist:

I have:

- [ ] updated the documentation and/or roadmap (if required)
- [ ] added unit or e2e tests
- [ ] provided instructions on how to upgrade

Author: jacobweinstock

bash/hook-lk-containers.sh

@@ -6,24 +6,27 @@ function build_all_hook_linuxkit_containers() {
 
 	# when adding new container builds here you'll also want to add them to the
 	# `linuxkit_build` function in the linuxkit.sh file.
-	build_hook_linuxkit_container images/hook-bootkit HOOK_CONTAINER_BOOTKIT_IMAGE
-	build_hook_linuxkit_container images/hook-docker HOOK_CONTAINER_DOCKER_IMAGE
-	build_hook_linuxkit_container images/hook-mdev HOOK_CONTAINER_MDEV_IMAGE
-	build_hook_linuxkit_container images/containerd HOOK_CONTAINER_CONTAINERD_IMAGE
-	build_hook_linuxkit_container images/runc HOOK_CONTAINER_RUNC_IMAGE
+	# # NOTE: linuxkit containers must be in the images/ directory
+	build_hook_linuxkit_container hook-bootkit HOOK_CONTAINER_BOOTKIT_IMAGE
+	build_hook_linuxkit_container hook-docker HOOK_CONTAINER_DOCKER_IMAGE
+	build_hook_linuxkit_container hook-mdev HOOK_CONTAINER_MDEV_IMAGE
+	build_hook_linuxkit_container hook-containerd HOOK_CONTAINER_CONTAINERD_IMAGE
+	build_hook_linuxkit_container hook-runc HOOK_CONTAINER_RUNC_IMAGE
 }
 
 function build_hook_linuxkit_container() {
 	declare container_dir="${1}"
 	declare -n output_var="${2}" # bash name reference, kind of an output var but weird
+	declare container_base_dir="images"
 
 	# Lets hash the contents of the directory and use that as a tag
 	declare container_files_hash
-	container_files_hash="$(find "${container_dir}" -type f -print | LC_ALL=C sort | xargs sha256sum | sha256sum | cut -d' ' -f1)"
+	# NOTE: linuxkit containers must be in the images/ directory
+	container_files_hash="$(find "${container_base_dir}/${container_dir}" -type f -print | LC_ALL=C sort | xargs sha256sum | sha256sum | cut -d' ' -f1)"
 	declare container_files_hash_short="${container_files_hash:0:8}"
 
 	declare container_oci_ref="${HOOK_LK_CONTAINERS_OCI_BASE}${container_dir}:${container_files_hash_short}-${DOCKER_ARCH}"
-	log info "Consider building LK container ${container_oci_ref} from ${container_dir} for platform ${DOCKER_ARCH}"
+	log info "Consider building LK container ${container_oci_ref} from ${container_base_dir}/${container_dir} for platform ${DOCKER_ARCH}"
 	output_var="${container_oci_ref}" # the the name reference
 	echo "${output_var}" > /dev/null  # no-op; just to avoid shellcheck SC2034 (unused var; but it is actually a bash nameref)
 
@@ -50,13 +53,13 @@ function build_hook_linuxkit_container() {
 		exit 9
 	fi
 
-	log info "Building ${container_oci_ref} from ${container_dir} for platform ${DOCKER_ARCH}"
+	log info "Building ${container_oci_ref} from ${container_base_dir}/${container_dir} for platform ${DOCKER_ARCH}"
 	(
-		cd "${container_dir}" || exit 1
+		cd "${container_base_dir}/${container_dir}" || exit 1
 		docker buildx build --load "--progress=${DOCKER_BUILDX_PROGRESS_TYPE}" -t "${container_oci_ref}" --platform "linux/${DOCKER_ARCH}" .
 	)
 
-	log info "Built ${container_oci_ref} from ${container_dir} for platform ${DOCKER_ARCH}"
+	log info "Built ${container_oci_ref} from ${container_base_dir}/${container_dir} for platform ${DOCKER_ARCH}"
 
 	push_hook_linuxkit_container "${container_oci_ref}"