Live chat application with node.js and socket.io

This week’s homework was to get running with node.js on Digital Ocean server, as well as Chat application example with socket.io.

Here it is working:

The task was to make it “more fun and more interesting”.

Things I wanted to do:

do some CSS styling
show sent messages on the page, so it looks like an actual chat
once messages are shown, make them appear in the right order on both browsers (before it was a bit messy and looked different on two windows)

Here it is running:

Here how it looks on two browsers:

My code can be found here on github: TBC (as soon as I learn how to push my files to github). Here is html code without running on a server.

Questions I have from this homework:

Is there any way to instantly see changes on the browser while editing the code and without having to upload index-hw.html file to Cyberduck over and over again?
It seems like we installed node modules together with socket.io directly to the folder in Cyberduck, what if I want to have a folder on my desktop: do I have to install node and socket.io all over again?
<div align=”center”> seems not to be working and I had to use margin to put my user input div to the center. It doesn’t seem that comfortable as I might have to change it every time depending on the screen size. Is there anything that could be used instead of align?
I didn’t succeed in making user input box bigger — how should I do it?
When I’m ready to publish application: what url should I give to the public?