Update Docker requirements page to be more container runtime agnostic (#7655)

Author: kiview

docs/supported_docker_environment/index.md

@@ -1,28 +1,25 @@
-# General Docker requirements
+# General Container runtime requirements
 
 ## Overview
 
-Testcontainers requires a Docker-API compatible container runtime. 
-During development, Testcontainers is actively tested against recent versions of Docker on Linux, as well as against Docker Desktop on Mac and Windows. 
+To run Testcontainers-based tests, 
+you need a Docker-API compatible container runtime, 
+such as using [Testcontainers Cloud](https://www.testcontainers.cloud/) or installing Docker locally.
+During development, Testcontainers is actively tested against recent versions of Docker on Linux,
+as well as against Docker Desktop on Mac and Windows.
 These Docker environments are automatically detected and used by Testcontainers without any additional configuration being necessary.
 
-It is possible to configure Testcontainers to work for other Docker setups, such as a remote Docker host or Docker alternatives. 
-However, these are not actively tested in the main development workflow, so not all Testcontainers features might be available and additional manual configuration might be necessary. 
-If you have further questions about configuration details for your setup or whether it supports running Testcontainers-based tests, 
+It is possible to configure Testcontainers to work with alternative container runtimes.
+Making use of the free [Testcontainers Desktop](https://testcontainers.com/desktop/) app will take care of most of the manual configuration.
+When using those alternatives without Testcontainers Desktop, 
+sometimes some manual configuration might be necessary 
+(see further down for specific runtimes, or [Customizing Docker host detection](/features/configuration/#customizing-docker-host-detection) for general configuration mechanisms).
+Alternative container runtimes are not actively tested in the main development workflow,
+so not all Testcontainers features might be available.
+If you have further questions about configuration details for your setup or whether it supports running Testcontainers-based tests,
 please contact the Testcontainers team and other users from the Testcontainers community on [Slack](https://slack.testcontainers.org/).
 
-| Host Operating System / Environment | Minimum recommended docker versions | Known issues / tips                                                                                                                                                                                                                                                                       |
-|-------------------------------------|-----------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| Linux - general                     | Docker v17.09              | After docker installation, follow [post-installation steps](https://docs.docker.com/engine/install/linux-postinstall/).                                                                                                                                                                   |
-| Linux - CircleCI (LXC driver)      | Docker v17.09               | The `exec` feature is not compatible with CircleCI. See CircleCI configuration [example](./continuous_integration/circle_ci.md)                                                                                                                                                           |
-| Linux - within a Docker container            | Docker v17.09              | See [Running inside Docker](continuous_integration/dind_patterns.md) for Docker-in-Docker and Docker wormhole patterns                                                                                                                                                                    |
-| Mac OS X - Docker Toolbox           | Docker Machine v0.8.0  |                                                                                                                                                                                                                                                                                           |
-| Mac OS X - Docker for Mac      | v17.09          | Starting 4.13, run `sudo ln -s $HOME/.docker/run/docker.sock /var/run/docker.sock`<br>Support is best-efforts at present<br>`getTestHostIpAddress()` is [not currently supported](https://github.com/testcontainers/testcontainers-java/issues/166) due to limitations in Docker for Mac. |
-| Windows - Docker Toolbox            |                             | *Support is limited at present and this is not currently tested on a regular basis*.                                                                                                                                                                                                      |
-| Windows - Docker for Windows   |                             | *Support is best-efforts at present.* Only Linux Containers (LCOW) are supported at the moment. See [Windows Support](windows.md)                                                                                                                                                         |
-| Windows - Windows Subsystem for Linux (WSL) | Docker v17.09                       | *Support is best-efforts at present.* Only Linux Containers (LCOW) are supported at the moment. See [Windows Support](windows.md).                                                                                                                                                        |
-
-## Using Colima?
+## Colima
 
 In order to run testcontainers against [colima](https://github.com/abiosoft/colima) the env vars bellow should be set