Add docker files (#55)

* Add docker files

* Improve docker-compose compatibility

* Use Openstack's standard port

* Use package ffmpeg-dev instead of ffmpeg

* improve dockerfile and config

* Add short docker guide

* adhere to previous naming conventions

* document former json comments

* Undo init.sh approach to touching the db file

* Make clear that it's about files on the host system

* add local path specifier

Co-authored-by: Denys Vitali <denys.vitali@swisscom.com>

Dockerfile

@@ -0,0 +1,38 @@
+FROM node:10-alpine3.11
+
+WORKDIR /app
+
+# build audiowaveform from source
+
+RUN apk add git make cmake gcc g++ libmad-dev libid3tag-dev libsndfile-dev gd-dev boost-dev libgd libpng-dev zlib-dev
+RUN apk add zlib-static libpng-static boost-static
+
+RUN apk add autoconf automake libtool gettext
+RUN wget https://github.com/xiph/flac/archive/1.3.3.tar.gz
+RUN tar xzf 1.3.3.tar.gz
+RUN cd flac-1.3.3/ && ./autogen.sh
+RUN cd flac-1.3.3/ && ./configure --enable-shared=no
+RUN cd flac-1.3.3/ && make
+RUN cd flac-1.3.3/ && make install
+
+RUN git clone https://github.com/bbc/audiowaveform.git
+RUN mkdir audiowaveform/build/
+RUN cd audiowaveform/build/ && cmake -D ENABLE_TESTS=0 -D BUILD_STATIC=1 ..
+RUN cd audiowaveform/build/ && make
+RUN cd audiowaveform/build/ && make install
+
+# install other requirements
+
+RUN apk add graphicsmagick ffmpeg-dev ghostscript
+
+# install node package
+
+COPY package*.json ./
+RUN npm install
+COPY . .
+
+# start app
+
+EXPOSE 9666
+CMD ["node", "spacedeck.js"]
+