new prebuild container

[TwistingTwists]

{
	"image": "hexpm/elixir:1.15.4-erlang-26.0.2-debian-buster-20230612-slim",
	"customizations": {
		"vscode": {
			"extensions": [
				"mjmcloug.vscode-elixir"
			]
		}
	}
}