Add Docker build stuff

docker/.dockerignore

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+.git
+.gitignore
+*.swp
+*.csv
+README.md

docker/Dockerfile

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+# Dockerfile for running combine - https://github.com/mlsecproject/combine
+# written by Kyle Maxwell
+
+#MAINTAINER Kyle Maxwell, [email protected]
+FROM ubuntu:14.04
+RUN apt-get update && \
+  apt-get dist-upgrade -y
+RUN apt-get install -y --no-install-recommends \
+  python-pip  \
+  python-dev \
+  build-essential \
+  python-virtualenv \
+  git && \
+
+  groupadd -r combine && \
+  useradd -r -g combine -d /home/combine -s /sbin/nologin -c "Combine user" combine
+
+WORKDIR /home
+RUN git clone https://github.com/mlsecproject/combine.git && \
+  chown -R combine:combine /home/combine && \
+  cd combine && \
+  pip install -r requirements.txt
+
+USER combine
+ENV HOME /home/combine
+ENV USER combine
+COPY combine.cfg /home/combine/
+WORKDIR /home/combine
+CMD ["python", "combine.py", "-e"]

docker/README.md

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+# combine-docker
+
+A simple Dockerfile for running [Combine](https://github.com/mlsecproject/combine). Also on [Docker Hub](https://registry.hub.docker.com/u/technoskald/combine/).
+
+If you prefer to use the Docker file rather than pull from the Docker hub, then run with something like:
+- `sudo docker build .`
+Then note the ID at the end and run:
+- `sudo docker run --rm -v \`pwd\`/harvest.csv:/combine/harvest.csv IDHERE`