Update Hosting.md

[hitjethva]

Add step by step instruction on "How to Install Sails.js Framework with Nginx as a Reverse Proxy on Ubuntu 20.04"

[sailsbot]

Hi @hitjethva! It looks like the title of your pull request doesn’t quite match our guidelines yet. Would you please edit your pull request's title so that it begins with [proposal], [patch], [fixes #<issue number>], [implements #<other PR number>], or [misc]? Once you've edited it, I'll take another look!

[sailsbot]

Oh hey again, @hitjethva. Now that this pull request is reopened, it's on our radar. Please let us know if there's any new information we should be aware of!

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[hitjethva]

[proposal] Add step by step instruction guide on "How to Install Sails.js Framework with Nginx as a Reverse Proxy on Ubuntu 20.04"