feature/prettier (css, html, js, json, less, md, scss, yaml)

[wookiefriseur]

Only tested manually, but works so far.

Adds support for:
css, html, javascript, json, less, markdown, scss, yaml

See #9

Notes:

1. Changed the order of copy and chown instructions in the dockerfiles so that working dir and write permissions are already set, when yarn install is executed (container doesn't know pushd and popd commands, which would have been an alternative)
2. Prettier plugins raised execution times to 500-1500 ms even with repeated requests, which is not OK. The official plugins add ∅ 20ms for each plugin, the inofficial ones about 10 times as much. No idea if that is due to how Prettier loads plugins, or if the plugins are not well optimised.

[jr-cologne]

Thank you very much for your work, @wookiefriseur!

All in all, your PR looks very good and everything seems to work flawlessly.
It's perfectly fine to drop those prettier plugins for additional languages.
If Prettier is not performing well enough, we can easily support other languages like php with other formatters.

As you can see, I have just requested some small changes which have to do with my preference for npm over yarn.
If you don't have any good reasons for using yarn, I would ask you to make the switch to npm.
In my view, installing yarn just to install the prettier package is a little bit pointless.

Moreover, I would be happy if we could also support the sass syntax/language in addition to scss.
Do you know whether Prettier also supports that?

Thank you in advance.
Have a nice evening! 😃

[wookiefriseur]

Moreover, I would be happy if we could also support the sass syntax/language in addition to scss.
Do you know whether Prettier also supports that?

It can do sass using the scss parser. I avoided it because it seems to have some problems with semicolons. But it's getting fixes on a regular basis, so I'll just add it and hope for the best.

[jr-cologne]

It can do sass using the scss parser. I avoided it because it seems to have some problems with semicolons. But it's getting fixes on a regular basis, so I'll just add it and hope for the best.

Alright, let's hope for the best. In case there are too many bugs, we can still drop it in the future. 😃

[wookiefriseur]

Alright, let's hope for the best. In case there are too many bugs, we can still drop it in the future. 😃

After testing a bit it looks like the scss parser does not even understand Sass. Will try to find a solution at a later date.

[jr-cologne]

Ok, no problem.
Feel free to merge.