Adding Docker support

.dockerignore

@@ -0,0 +1,2 @@
+.idea/
+Vagrant/

Dockerfile

@@ -0,0 +1,33 @@
+FROM python:3.4-slim-stretch
+
+WORKDIR /tmp
+COPY . .
+
+RUN echo 'deb http://deb.debian.org/debian stretch main non-free' > /etc/apt/sources.list \
+    && apt-get -q update \
+    && BUILD_PACKAGES='wget build-essential libffi-dev libfdk-aac-dev automake autoconf' \
+    && apt-get install -qy --force-yes $BUILD_PACKAGES lame flac faac libav-tools vorbis-tools opus-tools \
+    && wget https://github.com/nu774/fdkaac/archive/v0.6.3.tar.gz \
+        && tar xvf v0.6.3.tar.gz \
+        && cd fdkaac-0.6.3 \
+        && autoreconf -i \
+        && ./configure \
+        && make install \
+        && cd .. \
+    && ARCHIVE=libspotify-12.1.51-Linux-$(uname -m)-release \
+    && wget -O ${ARCHIVE}.tar.gz https://github.com/mopidy/libspotify-archive/blob/master/${ARCHIVE}.tar.gz?raw=true \
+        && tar xvf ${ARCHIVE}.tar.gz \
+        && cd ${ARCHIVE}/ \
+        && make install prefix=/usr/local \
+        && cd .. \
+        && python setup.py install \
+    && apt-get remove --purge -qy --force-yes $BUILD_PACKAGES \
+    && apt-get autoremove -qy --force-yes \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/* \
+    && rm -rf /tmp/*
+
+WORKDIR /data
+VOLUME ["/data"]
+ENTRYPOINT ["spotify-ripper"]
+CMD ["--help"]

README.rst

@@ -424,6 +424,33 @@ Windows
 Unfortunately, pyspotify seems to have an issue building on Windows (if someone can get this to work, please let me know). The best alternative is to run a linux distribution in a virtual machine.  Basic instructions to install Ubuntu on Virtual Box can be found in the `wiki <https://github.com/hbashton-ripper/wiki/Windows>`__.
 
 
+Docker
+~~~~~~
+
+It's also possible to build & run spotify-ripper as a Docker container.
+
+To build the image:
+
+.. code:: bash
+
+    $ docker build -t spotify-ripper:latest .
+
+To run the image:
+
+.. code:: bash
+
+    $ docker run -it --rm \
+      -v ~/Music:/data \
+      -v ~/.spotify-ripper:/root/.spotify-ripper \
+      spotify-ripper:latest \
+      -d /data spotify:track:52xaypL0Kjzk0ngwv3oBPR
+
+In the above example:
+
+- Ripped files will be stored in host machine's ``~/Music`` folder, mapped to container's ``/data`` folder
+
+- Configuration & Spotify key will be read from ``~/.spotify-ripper``
+
 Optional Encoding Formats
 ~~~~~~~~~~~~~~~~~~~~~~~~~