add plugin drone-docker-buildx

.batchfile

@@ -1 +1,2 @@
 https://github.com/thegeeklab/drone-docker;docs;content/plugins/drone-docker
+https://github.com/thegeeklab/drone-docker-buildx;docs;content/plugins/drone-docker-buildx

README.md

@@ -1,3 +1,16 @@
 # drone-plugin-index
 
+[![Build Status](https://img.shields.io/drone/build/thegeeklab/drone-plugin-index?logo=drone&server=https%3A%2F%2Fdrone.thegeeklab.de)](https://drone.thegeeklab.de/thegeeklab/drone-plugin-index)
+[![GitHub contributors](https://img.shields.io/github/contributors/thegeeklab/drone-plugin-index)](https://github.com/thegeeklab/drone-plugin-index/graphs/contributors)
+[![License: MIT](https://img.shields.io/github/license/thegeeklab/drone-plugin-index)](https://github.com/thegeeklab/drone-plugin-index/blob/main/LICENSE)
+
 Drone CI custom resource documentation.
+
+## Contributors
+
+Special thanks goes to all [contributors](https://github.com/thegeeklab/drone-plugin-index/graphs/contributors). If you would like to contribute,
+please see the [instructions](https://github.com/thegeeklab/drone-plugin-index/blob/main/CONTRIBUTING.md).
+
+## License
+
+This project is licensed under the MIT License - see the [LICENSE](https://github.com/thegeeklab/drone-plugin-index/blob/main/LICENSE) file for details.

content/_index.md

@@ -7,4 +7,4 @@ title: Documentation
 You should not trust any Docker resource on the internet without verification! Use it at your own risk.
 {{< /hint >}}
 
-This project provides documentation custom Drone CI plugins maintained by us.
+This project provides documentations for custom Drone CI plugins maintained by us. As mentioned, all plugins listed here are custom Drone plugins and not officially supported by Drone. Therefor, **don't use the official Drone support channels** and report issues in the corresponding repositories instead.