build: add latest tag

Signed-off-by: Peter Balogh <poke@riptides.io>

Author: pbalogh-sa

docker-bake.hcl

@@ -9,6 +9,7 @@ function "get_tag" {
     tags,
     [
       "${IMAGE_REPO}/${name}:${IMAGE_TAG}",
+      "${IMAGE_REPO}/${name}:latest"
     ]
   )
 }