Docs: Installation Guide Improve Manual Steps

[edborsa]

Hey guys

So I was just doing the manual steps on the installation guide and noticed while copy and pasting the seeds that there were double %% causing it to now work inside the iex. I also added an example on those seeds explicitly changing the value of <%= site %> to the name of the example provided:

(and I found a typo in one of the commits)

I have a question, the same thing happens on the seeds.exs, the double %%, is it a typo? Or it is a syntax that IDK about it?

[leandrocp]

I have a question, the same thing happens on the seeds.exs, the double %%, is it a typo? Or it is a syntax that IDK about it?

That file is evaluated by EEx and the double %% works like a template that will eventually result in a single % on the generated file, so that's expected.

Thanks for the fix on documentation!