Server deployment notes

[dreeves]

Sergii, could you jot down an outline of what you did to spin up the Digital Ocean instance and install Etherpad on it? The README might be a good place for notes like that.

[skalinchuk]

I will have to do it once more from scratch, because now it would be difficult to recollect preparation steps.

[dreeves]

Ok, not worth it to do it over again just to get the full steps. But just writing down what you can immediately remember in the README may be worth it.