[Enhancement] add option to use dockerContext as a configuration for the EnvironmentAndSystemPropertyClientProviderStrategy

core/src/main/java/org/testcontainers/dockerclient/EnvironmentAndSystemPropertyClientProviderStrategy.java

@@ -50,6 +50,11 @@ public EnvironmentAndSystemPropertyClientProviderStrategy() {
             case "autoIgnoringUserProperties":
                 applicable = configBuilder.isDockerHostSetExplicitly();
                 break;
+            case "dockerContext":
+                // none of the Testcontainers configuration are relevant when using docker contexts since we rely
+                // on the docker-java default to have all the necessary configuration already set.
+                applicable = true;
+                break;
             default:
                 throw new InvalidConfigurationException("Invalid value for dockerconfig.source: " + dockerConfigSource);
         }

core/src/test/java/org/testcontainers/dockerclient/EnvironmentAndSystemPropertyClientProviderStrategyTest.java

@@ -154,4 +154,20 @@ void notApplicableWhenIgnoringUserPropertiesAndNotConfigured() {
 
         assertThat(strategy.isApplicable()).isFalse();
     }
+
+    @Test
+    void applicableWhenUsingDockerContext() {
+        Mockito
+            .doReturn("dockerContext")
+            .when(TestcontainersConfiguration.getInstance())
+            .getEnvVarOrProperty(eq("dockerconfig.source"), anyString());
+
+        Properties oldProperties = System.getProperties();
+        try {
+            EnvironmentAndSystemPropertyClientProviderStrategy strategy = new EnvironmentAndSystemPropertyClientProviderStrategy();
+            assertThat(strategy.isApplicable()).isTrue();
+        } finally {
+            System.setProperties(oldProperties);
+        }
+    }
 }

docs/features/configuration.md

@@ -132,3 +132,11 @@ In addition, you can deactivate this behaviour by specifying:
 ```properties
 dockerconfig.source=autoIgnoringUserProperties # 'auto' by default
 ```
+
+## Docker Context support
+
+For users who wants to use docker context for host configuration can set the following property:
+```properties
+dockerconfig.source=dockerContext # 'auto' by default
+```
+Warning, this option will not do any extra checks, it defaults to whatever is configured through docker and/or docker context