As a user I would to be able to run a custom script before the server starts

[thescientist13]

This would allow any user to add additional babel presets like for react at the time CMD is run. possibly as an npm script (like in #3 ), or chained as part of babel-node? (but what about presets?).

So given a default

CMD ["babel-node", "--presets=@babel/preset-env", "server.js"]

Expose an npm script could be run by the user, following that pattern? e.g.

CMD ["ssr:hook:start"]

and in package.json

# must include @babel/preset-env
"scripts": {
  "patch": "npm install @babel/preset-react",
  "ssr:hook:start": "npm run patch && babel-node --presets=@babel/preset-react,@babel/preset-env server.js",
}