Add Usage documentation

[thedrow]

Other than https://github.com/TechEmpower/FrameworkBenchmarks/pull/1765/files I don't see usage examples of this library.
A full tutorial will allow others to adopt this library more easily.

[valyala]

Basic usage documentation must appear soon.

Thanks for the idea, @thedrow .

[valyala]

There are some examples available in the documentation.

[valyala]

Added switching from net/http to fasthttp section into README.

[abacaj]

Getting better with the docs / examples, maybe time to have a small dedicated site to fasthttp for better display of docs / examples, tools that come to mind - Hugo, Hexo, gitbook

[valyala]

Yeah, this site will be created with github pages.

[abacaj]

@valyala if you need styling help for a theme or something similar, I can lend a hand - I was a front end dev for about a year.

[valyala]

Cool! @abacaj , could you create initial site version using github pages under your account? Then I could review and publish it.
Currently I have no idea what contents this site should contain other than README.md :)

[valyala]

Examples folder has been added.

[valyala]

Added helloworldserver example.

Closing the bug, since it looks like documentation minimum has been reached.

[thedrow]

Thanks.