Update styling to match new Chrome/devtools flat design.

Feature Request

If you don't set your environment's URL options, generated URLs will contain example.com which is only handy if you're working on the new example.com.

Is your feature request related to a problem?

This comes up frequently on Discord, even though it is documented: https://docs

What would you like to be added:

Currently config uses one file per environment (eg. dev, staging, prod, etc) we should move to a multi-file config where we have one folder per environment and config values can be split across multiple files within this folder.

Why is this needed:

For setups where there are

Post description and comments should support markdown.

I believe markdown would be particularly useful to format hyperlinks, lists and quotes.

However, some markdown tags should not be parsed as usual (or not be parsed at all): for example a user should not be able to post a comment formatted with header ("#" character in markdown), because then the comment text would too big.

If you PATCHed to /posts/1, but send payload with a different id:

{
  data: {
    id: 789,
    type: 'posts',
    attributes: { ... }
  }
}

We pay attention to the payload and not the URL - instead let's throw an error when there is a mismatch.