add 3rd party lib license

Author: sharonx

LICENSE

@@ -198,4 +198,37 @@
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
-   limitations under the License.
+   limitations under the License.
+   
+=======================================================================
+Splunk Connect for Docker Subcomponents:
+
+The Splunk Connect for Docker project contains subcomponents with separate copyright
+notices and license terms. Your use of the source code for the these
+subcomponents is subject to the terms and conditions of the following
+licenses.
+
+========================================================================
+Apache License 2.0
+========================================================================
+The following components are provided under the Apache License 2.0. See project link for details.
+
+    (Apache License 2.0) logger, ioutils, urlutils, logdriver (https://github.com/moby/moby/blob/master/LICENSE)
+    (Apache License 2.0) fifo (https://github.com/containerd/fifo/blob/master/LICENSE)
+    (Apache License 2.0) go-plugin-helpers (https://github.com/docker/go-plugins-helpers/blob/master/LICENSE)
+
+========================================================================
+MIT licenses
+========================================================================
+The following components are provided under the MIT License. See project link for details.
+
+    (MIT License) logrus (https://github.com/sirupsen/logrus/blob/master/LICENSE)
+
+========================================================================
+BSD-style licenses
+========================================================================
+
+The following components are provided under a BSD-style license. See project link for details.
+
+    (BSD 2-Clause "Simplified" License) errors (https://github.com/pkg/errors/blob/master/LICENSE)
+    (BSD 3-Clause) protobuf/io (https://github.com/gogo/protobuf/blob/master/LICENSE)