replaced apache docker http client with zerodep http client

pom.xml

@@ -122,10 +122,10 @@
     		<version>3.3.3</version>
 		</dependency>
 		<dependency>
-            <groupId>com.github.docker-java</groupId>
-            <artifactId>docker-java-transport-httpclient5</artifactId>
-            <version>3.3.3</version>
-        </dependency>
+    		<groupId>com.github.docker-java</groupId>
+    		<artifactId>docker-java-transport-zerodep</artifactId>
+   			<version>3.3.3</version>
+		</dependency>
         <!--dependency>
             <groupId>com.github.docker-java</groupId>
             <artifactId>docker-java-core</artifactId>

src/main/java/de/hftstuttgart/dtabackend/utils/DockerUtil.java

@@ -8,8 +8,8 @@ import com.github.dockerjava.api.model.HostConfig;
 import com.github.dockerjava.core.DefaultDockerClientConfig;
 import com.github.dockerjava.core.DockerClientConfig;
 import com.github.dockerjava.core.DockerClientImpl;
-import com.github.dockerjava.httpclient5.ApacheDockerHttpClient;
 import com.github.dockerjava.transport.DockerHttpClient;
+import com.github.dockerjava.zerodep.ZerodepDockerHttpClient;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.springframework.core.env.Environment;
@@ -29,10 +29,10 @@ public class DockerUtil {
         DockerClientConfig dockerClientConfig = DefaultDockerClientConfig.createDefaultConfigBuilder().build();
 
         LOG.debug("create docker http client");
-        DockerHttpClient httpClient = new ApacheDockerHttpClient.Builder()
-            .dockerHost(dockerClientConfig.getDockerHost())
-            .sslConfig(dockerClientConfig.getSSLConfig())
-            .build();
+        ZerodepDockerHttpClient httpClient = new ZerodepDockerHttpClient.Builder()
+                .dockerHost(dockerClientConfig.getDockerHost())
+                .sslConfig(dockerClientConfig.getSSLConfig())
+        		.build();
 
         LOG.debug("create docker client");
         dockerClient = DockerClientImpl.getInstance(dockerClientConfig, httpClient);