Make a BDG "socials" page ("contact us" page)

[davidthecodingguy]

We have a LinkedIn group and the Meetup.com pages but let's discuss what social media platforms we want accounts on and then after Joe makes them we can add them to this page.

Also, Ember is going to make a newsletter so that could be good to add to this page as well.

Let's add some paragraphs explaining what Slack is and what we do there, (e.g. the hiring channel), and do the same for other sites. Everywhere you can find the Guild online.