Add dockerfile with gitbook and calibre

Dockerfile-calibre

@@ -0,0 +1,49 @@
+# ==================================================================================================
+#
+# Docker gitbook helper image
+#
+# Provide gitbook commands in a docker image to build and deploy your docs.
+#
+# Helpful commands:
+#
+# Build the docker image:
+# docker build --file Dockerfile-calibre -t desosa/calibre .
+#
+# Run bash in the image to call gitbook.
+# docker run -p 4000:4000 -it -v ${CURDIR}:/gitbook -w /gitbook desosa/calibre bash
+#
+# Known issue: https://github.com/GitbookIO/gitbook/issues/1309
+# Random complaints in gitbook build:
+# Error: ENOENT: no such file or directory, stat '/gitbook/_book/gitbook/gitbook-plugin-fontsettings/fontsettings.js'
+# 
+# To serve separately:
+# cd _book; python -m SimpleHTTPServer 4002
+#
+# ==================================================================================================
+
+# Base image, default node image
+FROM node:8.4.0-slim
+
+# Environment configuration
+ENV GITBOOK_VERSION="3.2.3"
+
+# Install gitbook and lftp
+RUN npm install --global gitbook-cli \
+	&& gitbook fetch ${GITBOOK_VERSION} \
+	&& npm cache clear --force \
+	&& apt-get update \
+	&& apt-get install --no-install-recommends --no-install-suggests -y lftp calibre \
+	&& rm -rf /var/lib/apt/lists/* \
+	&& rm -rf /tmp/*
+
+# Current directory configuration
+WORKDIR /gitbook
+
+# Volume for gitbook operations
+VOLUME /gitbook
+
+# Ports for serve command
+EXPOSE 4000 35729
+
+# Default cmd is version display
+CMD /usr/local/bin/gitbook -V