build: add readme

README.md

+# pubsweet-logger
+
+A module encapsulating standard logging features for pubsweet components and services.
+
+
+[![MIT license](https://img.shields.io/badge/license-MIT-e51879.svg)](https://gitlab.coko.foundation/pubsweet/pubsweet-logger/raw/master/LICENSE) 
+[![npm](https://img.shields.io/npm/v/pubsweet.svg)](https://npmjs.com/package/pubsweet-logger) 
+[![build status](https://gitlab.coko.foundation/yld/pubsweet-logger/badges/master/build.svg)](https://gitlab.coko.foundation/yld/pubsweet-logger/commits/master)
+[![coverage report](https://gitlab.coko.foundation/yld/pubsweet-logger/badges/master/coverage.svg)](https://gitlab.coko.foundation/yld/pubsweet-logger/commits/master) 
+[![code style standard](https://img.shields.io/badge/code%20style-standard-green.svg)](https://standardjs.com/) 
+[![mattermost chat](https://img.shields.io/badge/mattermost_chat-coko%2Fpubsweet-blue.svg)](https://mattermost.coko.foundation/coko/channels/pubsweet)
+