Create CSS/HTML mockups for new lfe.io site

[oubiwann]

After getting a sense of what to create in #71, examine these Bootstrap examples/components that might be useful as starting points in assembling a mockup:

• Top-nav:
  • https://getbootstrap.com/docs/4.5/examples/product/
  • https://getbootstrap.com/docs/4.5/examples/navbars/
• Above the fold:
  • https://getbootstrap.com/docs/4.5/examples/jumbotron/
  • https://getbootstrap.com/docs/4.5/examples/carousel/
• Code excerpts:
  • https://getbootstrap.com/docs/4.5/components/navs/#tabs
  • https://getbootstrap.com/docs/4.5/components/navs/#javascript-behavior
• Below the fold
  • cards
    • https://getbootstrap.com/docs/4.5/components/card/
    • https://getbootstrap.com/docs/4.5/examples/jumbotron/
  • call outs
    • https://getbootstrap.com/docs/4.5/examples/navbar-static/
    • https://getbootstrap.com/docs/4.5/examples/jumbotron/
  • footer
    • https://getbootstrap.com/docs/4.5/examples/product/

[oubiwann]

Okay, I think I have a rough skeleton I can style now: