How do I enable gzip compression on Spaces?

Same for me compression breaks Javascript files.

For (Laravel) PHP you can also use gzencode - php doc - as told by dev.to to gzip encode images or other files before you send them to your CDN. And this applies to any CDN, whether it is Amazon S3 or Digital Ocean Spaces. Laravel example by Nivesh Saharan at Dev.to:

$disk = config('filesystems.cloud'); // Returns s3

$settings = $shop->app_settings(); // Returns an array of all the settings

$content = view()->make('scripts.settings', compact('settings'))->__toString(); // Loads a view with all the settings

$gzippedContent = gzencode($content); // gzip compress the content

$fileName = 'settings/' . $shop->domain . '.js';

// Here we upload the file to S3
$response = \Storage::disk($disk)->put($fileName, $content, [
    'visibility'     => 'public',
    'ContentType'    => 'application/javascript',
    'ContentEncoding'=> 'gzip',
]);

Example is again a js file. Most of us want this for images especially, so you would need to change ContentType and make some other tweaks. But overall a very good example.

This is the main blocker from us moving from cloudfront to Space to serve our static files