What's the best way to read a file that's in a lambda's zip? I have some code in a CallbackFunction's

callback

property (typescript), and it uses

fs.readFileSync("subdir/file")

. This works so long as subdir/file is relative to the pulumi project. But since the CallbackFunction is defined in a component resource in a different subdirectory, it's pretty confusing. I'd like subdir/file to be relative to the directory that the CallbackFunction is defined in.