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The following commit(s) were added to refs/heads/master by this push:
     new c735ebb  NUTCH-2736 Upgrade Dockerfile to be based on recent Ubuntu 
LTS version - upgrade to use Ubuntu 18.04 - remove installed packages not 
required to build Nutch
     new caa9422  Merge pull request #472 from 
sebastian-nagel/NUTCH-2736-docker-upgrade-base-image
c735ebb is described below

commit c735ebb7a40dd3e6ab29583ada91a73378922874
Author: Sebastian Nagel <sna...@apache.org>
AuthorDate: Wed Sep 25 10:29:05 2019 +0200

    NUTCH-2736 Upgrade Dockerfile to be based on recent Ubuntu LTS version
    - upgrade to use Ubuntu 18.04
    - remove installed packages not required to build Nutch
---
 docker/Dockerfile | 8 ++++----
 docker/README.md  | 4 ++--
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/docker/Dockerfile b/docker/Dockerfile
index c5ba807..3077d1a 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -13,20 +13,20 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM ubuntu:16.04
-MAINTAINER Michael Joyce <jo...@apache.org>
+FROM ubuntu:18.04
+MAINTAINER Apache Nutch Committers <d...@nutch.apache.org>
 
 WORKDIR /root/
 
 
 # Install dependencies
 RUN apt update
-RUN apt install -y ant openssh-server vim telnet git rsync curl 
openjdk-8-jdk-headless
+RUN apt install -y ant git openjdk-8-jdk-headless
 
 # Set up JAVA_HOME
 RUN echo 'export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64' >> $HOME/.bashrc
 
-# Checkout and build the nutch trunk
+# Checkout and build the Nutch master branch (1.x)
 RUN git clone https://github.com/apache/nutch.git nutch_source && cd 
nutch_source && ant runtime
 
 # Convenience symlink to Nutch runtime local
diff --git a/docker/README.md b/docker/README.md
index 36fc852..25d601f 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -14,11 +14,11 @@ Nutch can run on a single machine, but gains a lot of its 
strength from running
 
 Current configuration of this image consists of components:
 
-*      Nutch 1.x
+*      Nutch 1.x (branch "master")
 
 ##  Base Image
 
-* [ubuntu:14.04](https://registry.hub.docker.com/_/ubuntu/)
+* [ubuntu:18.04](https://hub.docker.com/_/ubuntu/)
 
 ## Tips
 

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