Expose docker client configuration

Author: arakelian

README.md

@@ -102,7 +102,7 @@ Add the following to your `pom.xml`:
 <dependency>
     <groupId>com.arakelian</groupId>
     <artifactId>docker-junit-rule</artifactId>
-    <version>4.0.7</version>
+    <version>4.1.0</version>
     <scope>test</scope>
 </dependency>
 ```
@@ -117,7 +117,7 @@ repositories {
 }
 
 dependencies {
-  testCompile 'com.arakelian:docker-junit-rule:4.0.7'
+  testCompile 'com.arakelian:docker-junit-rule:4.1.0'
 }
 ```
 

src/main/java/com/arakelian/docker/junit/Container.java

@@ -292,7 +292,8 @@ private String createContainer() {
 
     protected DockerClient createDockerClient() throws DockerClientException {
         try {
-            final DockerClient dockerClient = DockerClientImpl.getInstance() //
+            final DockerClient dockerClient = DockerClientImpl //
+                    .getInstance(config.getDockerClientConfig()) //
                     .withDockerCmdExecFactory(new OkHttpDockerCmdExecFactory());
             return dockerClient;
         } catch (final IllegalStateException | IllegalArgumentException e) {

src/main/java/com/arakelian/docker/junit/model/DockerConfig.java

@@ -23,6 +23,8 @@
 
 import org.immutables.value.Value;
 
+import com.github.dockerjava.core.DefaultDockerClientConfig;
+import com.github.dockerjava.core.DockerClientConfig;
 import com.google.common.collect.ImmutableList;
 
 /**
@@ -70,6 +72,12 @@ public List<HostConfigConfigurer> getHostConfigConfigurer() {
      */
     public abstract String getImage();
 
+    @Value.Default
+    @Value.Auxiliary
+    public DockerClientConfig getDockerClientConfig() {
+        return DefaultDockerClientConfig.createDefaultConfigBuilder().build();
+    }
+
     /**
      * Returns a list of listeners which are called when the container is started.
      *