Add PeerTube channel

[ghost]

Adds:

• PeerTube emblem
• PeerTube link to footer

Todo?

• Edit the community.md (website) file to mention YouTube & PeerTube?

[rodlie]

Thanks for the PR, a bit unsure if @samytichadou channel should be in the footer, existing links are for official sites.

We could maybe make it official(?).

[samytichadou]

Hi, not sure also, the link here points to my personal channel, it should points to an "official" friction channel.
An official youtube/peertube account would be a better way to work i think.
And of course np to put my videos on it !

[ghost]

I thought it was the official channel at first, same name same logo, so to avoid displaying/using YouTube only it made sense to add PeerTube, but since it's not the official… Case closed to me.
So let me know if you have another URL, else I will close this PR. Thanks!

[samytichadou]

same name same logo

You re right, i thought with my peertube handle it would be clearer than that, i'll change it in the future to avoid confusion.
I think i gave the precision in the channel infos too, but this is not enough.