Fix behavior of run_directory when static_export option is given

[hasundue]

When static_export option is given, other settings are overwritten with default values.
You know this is not the best way to fix that, so you do not necessarily have to merge this, obviously.

[fonsp]

Thanks! I moved this logic in #31 to

PlutoSliderServer.jl/src/Actions.jl

Lines 235 to 244 in 29d9f5b

	slider_server_url_js = if slider_server_running_somewhere
	abs_path = joinpath(start_dir, path)
	url_of_root = relpath(start_dir, dirname(abs_path)) # e.g. "." or "../../.."
	repr(something(
	settings.Export.slider_server_url,
	url_of_root
	))
	else
	"undefined"
	end

. This solves your issue, since the setting settings.Export.slider_server_url takes precedence.