Write section about JavaScript Client

[doublebyte1]

Complete section with step by step guide and screenshots, on how-to use Leaflet or OpenLayers to connect to OGC API Features, OGC API Vector Tiles.
There are two options:

• Write simple client with HTML+JavaScript
• Write a react client, but ptovide a docker container to run it locally, without the need to install node.

https://github.com/emotional-cities/byteroad-workshop#javascript