Fix bind mounts for ResourceReaper/ryuk and ContainerisedDockerCompose

Relates to #545
Relates to testcontainers#2998

Author: gesellix

core/src/main/java/org/testcontainers/DockerClientFactory.java

@@ -19,6 +19,7 @@
 import lombok.Synchronized;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang.SystemUtils;
 import org.testcontainers.dockerclient.DockerClientProviderStrategy;
 import org.testcontainers.dockerclient.DockerMachineClientProviderStrategy;
 import org.testcontainers.dockerclient.TransportConfig;
@@ -145,9 +146,12 @@ public String getRemoteDockerUnixSocketPath() {
         }
 
         URI dockerHost = getTransportConfig().getDockerHost();
-        return "unix".equals(dockerHost.getScheme())
+        String path = "unix".equals(dockerHost.getScheme())
             ? dockerHost.getRawPath()
             : "/var/run/docker.sock";
+        return SystemUtils.IS_OS_WINDOWS
+               ? "/" + path
+               : path;
     }
 
     /**

core/src/main/java/org/testcontainers/containers/DockerComposeContainer.java

@@ -608,7 +608,7 @@ public ContainerisedDockerCompose(List<File> composeFiles, String identifier) {
         //  as the docker daemon, just mapping the docker control socket is OK.
         // As there seems to be a problem with mapping to the /var/run directory in certain environments (e.g. CircleCI)
         //  we map the socket file outside of /var/run, as just /docker.sock
-        addFileSystemBind("/" + DockerClientFactory.instance().getRemoteDockerUnixSocketPath(), "/docker.sock", READ_WRITE);
+        addFileSystemBind(DockerClientFactory.instance().getRemoteDockerUnixSocketPath(), "/docker.sock", READ_WRITE);
         addEnv("DOCKER_HOST", "unix:///docker.sock");
         setStartupCheckStrategy(new IndefiniteWaitOneShotStartupCheckStrategy());
         setWorkingDirectory(containerPwd);

core/src/main/java/org/testcontainers/utility/ResourceReaper.java

@@ -76,7 +76,7 @@ public static String start(String hostIpAddress, DockerClient client) {
         DockerClientFactory.instance().checkAndPullImage(client, ryukImage);
 
         List<Bind> binds = new ArrayList<>();
-        binds.add(new Bind("/" + DockerClientFactory.instance().getRemoteDockerUnixSocketPath(), new Volume("/var/run/docker.sock")));
+        binds.add(new Bind(DockerClientFactory.instance().getRemoteDockerUnixSocketPath(), new Volume("/var/run/docker.sock")));
 
         String ryukContainerId = client.createContainerCmd(ryukImage)
                 .withHostConfig(new HostConfig().withAutoRemove(true))