Confusing messaging around npm start script

[joshwlewis]

I have a package.json that looks like this:

{
  "main": "dst/index.js",
  "scripts": {
    "start": "node dst/index.js",
    "compile": "tsc -p .",
    "test": "jest"
  },
  // ...other stuff
}

And I see this messaging when building the project with this buildpack:

[builder] ---> Parsing package.json
[builder] ---> No file to start server
[builder] ---> either use 'docker run' to start container or add index.js or server.js

This messaging makes it sound like I'm doing something wrong and I spent a few cycles trying to understand if I should fix my project layout. In the end, everything worked as-is, and the nodejs-npm-buildpack seemed to know about the start script. I just wonder if this message makes sense for a repo where there is no index.js/server.js but the start script is defined.