added readme file

README.md

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+# MongoDB
+![Release](https://github.com/instant-solutions/mongo/actions/workflows/build.yml/badge.svg)
+
+A Docker image which is based on the [Mongo image](https://hub.docker.com/_/mongo) and includes the [`mongo-healthcheck` binary](https://github.com/instant-solutions/mongo-healthcheck/).
+
+## Quick Start
+
+Open a terminal and run the following command:
+
+#### GitHub Container Registry
+
+``` 
+docker run -d -p 27017:27017 ghcr.io/instant-solutions/mongo
+```
+
+#### Docker Hub
+
+``` 
+docker run -d -p 27017:27017 i15s/mongo
+```
+
+For more information, please also refer to the base image documentation: https://hub.docker.com/_/mongo
+
+## Contribution
+
+Feel free to fork the project and send us a pull-request! :sunglasses:
+
+Or consider sponsoring us, so we can continue to work on this project: [GitHub Sponsors](https://github.com/sponsors/instant-solutions) :star_struck:
+
+## Author
+
+Made with :heart: in Austria by [instant:solutions OG](https://instant-it.at)