spindle/engine: setting up worklow

wid=knot1.tangled.sh-3m73jdakdjb22-deploy.yaml err="pulling image:
invalid reference format: repository name
(gleam/erlang_28/beamMinimal28Packages.rebar3/nodejs/bash/git/coreutils/nix)
must be lowercase"

.tangled/workflows/deploy.yaml

···
   nixpkgs:
     - gleam
     - erlang_28
-    - beamMinimal28Packages.rebar3
     - nodejs
 
 steps: