add: web server that exposes the basic UI

[cdscih]

This tool is supposed to be used primarily through a graphical interface exposed by a web server.

Ideally it would need to have a way to:

• setup all the required fields
• setup the endpoint you want to test
• a way to visualise the status of the test (live)
• an input space where to insert a javascript snippet that allows the user to create a function which creates the input to the http/s call

Note: This is probably going to be divided into subtasks later on.