Ask HN: Self hosted online IDE

I know this has been asked a few times in the past but I don't remember any real progress being made in the commends section.

I was wondering if anyone from here uses an online/web based IDE for development that you can host on your own hardware.

I write a lot of C, Java, Python and I think I'll be branching out to a few other languages as well, so it needs to be able to support a wide range of features.

I'm looking for something like this because I'm interested in using a very lightweight and energy efficient laptop for my day to day life (this way it's battery lasts long and it will be lighter then my Y70) and I still want to be able to develop on it.

I love lint and cross class completion features, so those are the biggest plus.

Anyone know of anything?