Add Site header/NavBar

[imadrig]

Description

DEV-32 - https://neptunedevs.atlassian.net/browse/DEV-32

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings

Testing Instructions

Please see Netlify Preview - a gray navigation bar with a logo placeholder should be visible on all pages.

Gotchas/What I learned

You can use Tailwind to apply a default height, and can set a break-point rule when the device screen reaches a certain size.

[netlify]

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[samwambam]

Praise: Nice tailwind additions