[ANN] Community Plugin - ChurnZero plugin

[r-ale...@tuta.io]

Hello, everyone!

I would like to present a simple plugin enables logging events from Kong to ChurnZero. 

ChurnZero is a customer success software. The customer support service use it to get a real-time dashboard on how customers are using a product.

The use-case is:

A customer support service wants to know if some customers stopping to use api.

The plugin sends events to ChurnZero every time when received request from a customer. The customer support is watching metrics on a dashboard.

The plugin catches events

1. from an upstream response headers in `header_filter` phase and 

2. from a route string matched to configured patterns in `access` phase.

Welcome to review code and documentation, create tickets (issues or PRs), suggest features etc.. what helps to increase a value and quality and release the project.

The project is in prerelease state because it lacks unit tests (planned to do) and integration tests (my question "How to test http request sent from a plugin?" remained unanswered https://groups.google.com/forum/#!topic/konglayer/b-Oex2zKLTA but still hope to get help)

GitHub repository: https://github.com/r-alekseev/kong-churnzero

GitHub project: https://github.com/r-alekseev/kong-churnzero/projects/1

LuaRocks module: https://luarocks.org/modules/r-alekseev/kong-churnzero

ChurnZero website: https://churnzero.net/

What is ChurnZero: https://churnzero.readme.io/docs/welcome-to-churnzero

Integrate ChurnZero using HTTP API: https://churnzero.readme.io/docs/integrate-churnzero-using-serverbackend-integration-http-api