add dockerfile (#275)

* add dockerfile

* [deprecated]remove MAINTAINER

docker/README.md

+# Using LightGBM via Docker
+
+This directory contains `Dockerfile` to make it easy to build and run LightGBM via [Docker](http://www.docker.com/).
+
+## Installing Docker
+
+Follow the general installation instructions
+[on the Docker site](https://docs.docker.com/installation/):
+
+* [OSX](https://docs.docker.com/installation/mac/): [docker toolbox](https://www.docker.com/toolbox)
+* [ubuntu](https://docs.docker.com/installation/ubuntulinux/)
+
+## Running the container
+
+Build the container, for python users: 
+
+    $ docker build -t lightgbm -f dockerfile-python .
+
+After build finished, run the container:
+
+    $ docker run --rm -it lightgbm

docker/dockerfile-python

+FROM ubuntu:16.04
+
+RUN apt-get update && \
+    apt-get install -y cmake build-essential gcc g++ git wget && \
+
+# open-mpi
+    cd /usr/local/src && mkdir openmpi && cd openmpi && \
+    wget https://www.open-mpi.org/software/ompi/v2.0/downloads/openmpi-2.0.1.tar.gz && \
+    tar -xzf openmpi-2.0.1.tar.gz && cd openmpi-2.0.1 && \
+    ./configure --prefix=/usr/local/openmpi && make && make install && \
+    export PATH="/usr/local/openmpi/bin:$PATH" && \
+
+# lightgbm
+    cd /usr/local/src && mkdir lightgbm && cd lightgbm && \
+    git clone --recursive https://github.com/Microsoft/LightGBM && \
+    cd LightGBM && mkdir build && cd build && cmake -DUSE_MPI=ON .. && make && \
+
+# python-package
+    # miniconda
+    wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh && \
+    /bin/bash Miniconda3-latest-Linux-x86_64.sh -f -b -p /opt/conda && \
+    export PATH="/opt/conda/bin:$PATH" && \
+    # lightgbm
+    conda install -y numpy scipy scikit-learn pandas && \
+    cd ../python-package && python setup.py install && \
+
+# clean
+    apt-get autoremove -y && apt-get clean && \
+    conda clean -i -l -t -y && \
+    rm -rf /usr/local/src/*
+
+ENV PATH /opt/conda/bin:$PATH