add readme

Author: mbretter

README.md

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+[//]: # ([![](https://github.com/mbretter/go-mmcli-svr/actions/workflows/go.yml/badge.svg)](https://github.com/mbretter/go-mmcli-svr/actions/workflows/go.yml))
+
+[//]: # ([![](https://goreportcard.com/badge/mbretter/go-mmcli-svr)](https://goreportcard.com/report/mbretter/go-mmcli-svr "Go Report Card"))
+
+[//]: # ([![codecov](https://codecov.io/gh/mbretter/go-mmcli-svr/graph/badge.svg?token=YMBMKY7W9X)](https://codecov.io/gh/mbretter/go-mmcli-svr))
+
+Dead simple queuing base upon mongodb
+