[Feature]: Add `basename` to remix config file

What is the new or updated feature that you are suggesting?

Somebody in discord asked if he could set a basename for a Remix app, so all routes would have that basename prepended to them: https://discord.com/channels/770287896669978684/770287896669978687/914576247068188692. I think this is something we could add to the remix.config.js file.

Why should this feature be included?

This would allow more flexibility in configuring a Remix app, giving more power to the developer a la “you own your stack.”

[meehawk]

@zachdtaylor I have started it. I wasn’t sure if you’re going to work on it. I’m really sorry 🥲

[kiliman]

It’s mentioned in the README

Depending on your setup, you may also need to update publicPath and assetsBuildDirectory to include your basePath. This will ensure that your assets will be served properly.

module.exports = {
  ignoredRouteFiles: ['.*'],
  publicPath: `${basePath}/build/`,
  assetsBuildDirectory: `public${basePath}/build`,
  ...
}