fix: prepare command

README.md

devenv.nix

examples/example1/pages/en.yaml

examples/example2/config/snippet.yaml

examples/example2/config/spec1.yaml

examples/example2/pages/en.yaml

examples/example2/snippets/meta/container.html

examples/example2/template/test.html

flake.nix

hashes.nix

project.nix

source/command.go

source/go.mod

source/go.sum

source/html/cut_test.go

source/html/generate.go

source/template/prepare.go

source/types/page-data.go

source/util/html.go

source/util/id.go