Minor fixes

[weareredrobot]

• Display UTF-8 characters correctly in the browser, also shows how to add headers to responses
• Add command to create empty composer.json before running require (stops potential prompts about the file being missing)

[weareredrobot]

Let me know if you're happy with this, and I'll update framework-x/docs/getting-started/quickstart.md to match the changes.

[SimonFrings]

@weareredrobot Thank you for looking into this 👍

There's nothing wrong to set up composer manually, but I don't think it is necessary to add the composer init command to the installation instructions. If you set up a fresh project without any composer files and then run composer require clue/framework-x:dev-main it will automatically create a composer.json and a composer.lock file.

You also added the Content-Type header which makes perfect sense ^^
The only thing I noticed is that the casing seems a bit off and that we often use single quotation marks for our headers (as seen in the response chapter).
This would look something like this:

return new React\Http\Message\Response(
    200, 
    [
        'Content-Type' => 'text/plain; charset=UTF-8'
    ],
    "Hello " . $request->getAttribute('name') . "!\n"
);

I'm interested in your thoughts on this!

[weareredrobot]

All good!