feat: Add support for loading plugins and specifying the default host

DOCUMENTATION/content/documentation/index.md

@@ -1077,6 +1077,14 @@ docker-compose up -d adminer
 
 2 - Open your browser and visit the localhost on port **8081**:  `http://localhost:8081`
 
+#### Additional Notes
+
+- You can load plugins in the `ADM_PLUGINS` variable in the `.env` file. If a plugin requires parameters to work correctly you will need to add a custom file to the container. [Find more info in section 'Loading plugins'](https://hub.docker.com/_/adminer).
+
+- You can choose a design in the `ADM_DESIGN` variable in the `.env` file. [Find more info in section 'Choosing a design'](https://hub.docker.com/_/adminer).
+
+- You can specify the default host with the `ADM_DEFAULT_SERVER` variable in the `.env` file. This is useful if you are connecting to an external server or a docker container named something other than the default `mysql`.
+
 **Note:** We've locked Adminer to version 4.3.0 as at the time of writing [it contained a major bug](https://sourceforge.net/p/adminer/bugs-and-features/548/) preventing PostgreSQL users from logging in. If that bug is fixed (or if you're not using PostgreSQL) feel free to set Adminer to the latest version within [the Dockerfile](https://github.com/laradock/laradock/blob/master/adminer/Dockerfile#L1): `FROM adminer:latest`