Adding a join page
The goal for this section is to add a join page like the one you see in the following screenshot, where you provide a name and you provide the room name you want to join.
You'll then be able to join a given room, talk to anybody else in that room and you won't be able to communicate with other people in other rooms:
This means that when you click on this form, you're going to click on Join and we're going to have some custom information passed into the URL into the chat application as we know it, the one that looks like this:
Updating the HTML file
Now in order to get that done, the first thing we're going to do is tweak the current HTML file. Right now, index.html is going to load first. We actually don't want that to be the case, when we go to localhost:3000 we want to show our new join page. So what I'm going to do instead is move this page by renaming it. We're going to rename index.html to chat.html. I'm going to do the exact same thing with index.js, renaming it to chat...
