Add Dockerfile and instructions

- starts an empty instance with an admin user

docker/Dockerfile

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+# Pull base image.
+FROM ubuntu:14.04
+
+RUN apt-get update
+RUN apt-get install -y apt-file
+RUN apt-get install -y python-software-properties software-properties-common
+RUN add-apt-repository -y ppa:ubuntugis/ubuntugis-unstable
+RUN apt-get update \
+&&  apt-get install -y aptitude \
+&&  aptitude install -y \
+    gdal-bin \
+    libgdal1-dev \
+    libxml2 \
+    python-lxml \
+    python-libxml2 \
+    libproj0 \
+    libproj-dev \
+    libgeos-dev \
+    libgeos++-dev \
+    cgi-mapserver \
+    python-mapscript \
+    python-psycopg2 \
+    postgis \
+    python-gdal \
+    python-pip \
+    wget \
+    git
+RUN apt-get install -y libpython-dev
+RUN  wget https://pypi.python.org/packages/source/p/pysqlite/pysqlite-2.6.3.tar.gz \
+&&  tar xzf pysqlite-2.6.3.tar.gz \
+&&  cd pysqlite-2.6.3 \
+&&  sed -i "/define=SQLITE_OMIT_LOAD_EXTENSION/c\#define=SQLITE_OMIT_LOAD_EXTENSION" setup.cfg \
+&&  sudo python setup.py install
+RUN cd - \
+&&  pip install "django>=1.7,<1.8" \
+&&  pip install twisted \
+&&  django-admin.py --version
+RUN git clone --recursive https://github.com/EOxServer/eoxserver
+RUN cd eoxserver \
+&&  python setup.py develop
+
+# temporary fix of spatialite init
+# takes very long if not set to 1
+RUN cd eoxserver/eoxserver/core/commands \
+&&  sed -i 's/InitSpatialMetadata()/InitSpatialMetadata(1)/g' create_instance.py
+
+RUN cd eoxserver \
+&&  eoxserver-admin.py create_instance eoxtest --init-spatialite
+RUN cd eoxserver/eoxtest \
+&&  python manage.py syncdb --noinput --traceback \
+&&  echo "from django.contrib.auth.models import User; User.objects.create_superuser('admin','test@eox.at','admin')" | python manage.py shell
+
+
+ENTRYPOINT cd eoxserver/eoxtest \
+&&  python manage.py runserver 0.0.0.0:8000

docker/Readme.md

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+# Start EOXServer using docker
+
+Install [docker](https://www.docker.com/) for your system.
+
+The next steps are:
+
+```sh
+git clone git@github.com:EOxServer/eoxserver.git
+cd eoxserver/
+docker build docker
+```
+
+This will give you a docker image ID as the last output e.g `55453fbf21c9`. The
+image ID can also be retrieved using the `docker images` command. The last image
+you built should be at the top of the list.
+
+Run
+
+```sh
+docker run -i -t --rm -p 8080:8000 $IMAGE_ID
+```
+
+where `$IMAGE_ID` is the image ID from before e.g. `55453fbf21c9`
+
+The first few unique characters also work:
+
+```sh
+docker run -i -t --rm -p 8080:8000 5545
+```
+
+EOxServer is now accessible at [http://localhost:8080/](http://localhost:8080/).
+And you can login to the `Admin Client` using:
+- username: admin
+- password: admin