Update metaljs.com for use with Electric v3.0.0

[robframpton]

No description provided.

[zenorocha]

Friendly ping @jbalsas.

[jbalsas]

Hey @zenorocha, thanks for the ping! I took a look the other day, but when testing, I saw this in the tutorials section:

I haven't had time to take a closer look, though :(

It's likely caused by some marble styling, I guess, so I'm not sure if that affects other places, so we should fix it in general, or just customize on top for this site.

[jbalsas]

The contribute section was also off, both in this PR and in current Marble, probably since we moved the repos around:

Metal points to an archived repo, and the github icon is not centered, not sure if that's a similar case that with the tutorial links and this affects elsewhere or needs some change?

Marble points to a deleted repo, so it returns a 404

[jbalsas]

Not from this PR, but worth fixing as well is the description of the tutorials. Otherwise, asdf is a good search term 😂

https://github.com/metal/metal.js/blob/master/packages/metaljs.com/src/pages/docs/tutorials/tutorial-todo-jsx/components.md
https://github.com/metal/metal.js/blob/master/packages/metaljs.com/src/pages/docs/tutorials/tutorial-todo-soy/components.md

[diegonvs]

Just started reviewing :)

Sent from GH.

[diegonvs]

Hey guys, i've continued at #369

[jbalsas]

Cool!