[Enhancement]: Support different docker context

Module

Core

Proposal

% docker context ls
NAME                  DESCRIPTION                               DOCKER ENDPOINT                                  KUBERNETES ENDPOINT                                           ORCHESTRATOR
default               Current DOCKER_HOST based configuration   unix:///var/run/docker.sock                      https://api.xpto.net:6443 (dlovison)   swarm
desktop-linux                                                   unix:///Users/dlovison/.docker/run/docker.sock                                                                 
my-remote-engine2 *                                             ssh://vagrant@192.168.56.6                                       

When I execute my test

16:25:20,932 ERROR (testng-ExampleJdg4931) [org.testcontainers.dockerclient.DockerClientProviderStrategy] Could not find a valid Docker environment. Please check configuration. Attempted configurations were:
16:25:20,932 ERROR (testng-ExampleJdg4931) [org.testcontainers.dockerclient.DockerClientProviderStrategy]     UnixSocketClientProviderStrategy: failed with exception InvalidConfigurationException (Could not find unix domain socket). Root cause NoSuchFileException (/var/run/docker.sock)
16:25:20,933 ERROR (testng-ExampleJdg4931) [org.testcontainers.dockerclient.DockerClientProviderStrategy] As no valid configuration was found, execution cannot continue

Inizia con il modulo Core e gli errori di DockerClientProviderStrategy mostrati nell’issue, in particolare UnixSocketClientProviderStrategy. Confronta il rilevamento attuale dell’ambiente Docker con le configurazioni elencate da docker context ls. Il lavoro è completato quando è possibile utilizzare un contesto Docker non predefinito selezionato invece di richiedere /var/run/docker.sock e i controlli pertinenti di Testcontainers hanno esito positivo.