adding docker and docker-compose

Dockerfile

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+FROM ubuntu:16.04
+
+RUN apt-get update && apt-get install -y \
+  vim \
+  wget \
+  git \
+  curl \
+  npm \
+  nodejs-legacy
+
+ARG VERSION=0.3.0
+
+# Download stable version
+# RUN wget https://github.com/xwiki-labs/cryptpad/archive /${VERSION}.tar.gz -O /cryptpad.tar.gz \
+#   && mkdir -p /cryptpad \
+#   && tar -xzf /cryptpad.tar.gz -C /cryptpad --strip-components=1 \
+#   && rm /cryptpad.tar.gz
+
+# Download from github
+# RUN git clone https://github.com/xwiki-labs/cryptpad.git
+
+# Add code directly
+ADD . /cryptpad
+
+WORKDIR /cryptpad
+
+RUN npm install \
+   && npm install -g bower \
+   && bower install --allow-root
+
+ADD container-start.sh /container-start.sh
+RUN chmod u+x /container-start.sh
+
+EXPOSE 3000
+
+VOLUME /cryptpad/datastore
+VOLUME /cryptpad/customize
+
+ENV USE_SSL=false
+ENV STORAGE='./storage/file'
+ENV LOG_TO_STDOUT=true
+
+CMD /container-start.sh