Docker to use Jekyll static page generator

Jekyll-Dockerfile

FROM ruby:2.4.1-alpine

# https://github.com/ffi/ffi/issues/485#issuecomment-209778567
RUN apk add --update build-base libffi-dev git openssh

ARG SRC_GEMFILE=Gemfile
ARG BUNDLE_GEMFILE=/src/ruby/Gemfile

# Install current gems with bundler
COPY $SRC_GEMFILE $BUNDLE_GEMFILE
COPY $SRC_GEMFILE.lock $BUNDLE_GEMFILE.lock
RUN bundler install --gemfile=$BUNDLE_GEMFILE

# This volume should be mounted when do `docker run`
WORKDIR /src/blog
CMD "/bin/sh"
EXPOSE 4000

Makefile

.PHONY: build start publish update-gemfile shell

export PROJECT_NAME := jekyll-docker
export HOST_PORT := 4000

# set true / false to test docker build
export DISABLE_DOCKER_CACHE := false

build:
	docker build \
	--no-cache=$(DISABLE_DOCKER_CACHE) \
	-t $(PROJECT_NAME):latest .

start: build
	docker run \
	-v $(PWD):/src/blog \
	--rm -ti -p $(HOST_PORT):4000 --name $(PROJECT_NAME) \
	$(PROJECT_NAME) jekyll serve --host=0.0.0.0 --incremental

publish: build
	docker run \
	-v $(PWD):/src/blog \
	-v $(HOME)/.gitconfig:/root/.gitconfig \
	-v $(HOME)/.ssh:/root/.ssh \
	--rm -t	$(PROJECT_NAME) rake blog:publish

update-gemfile:
	docker run \
	-v $(PWD):/src/blog \
	--rm -t	$(PROJECT_NAME) bundle install

shell:
	docker run \
	-v $(PWD):/src/blog \
	-v $(HOME)/.gitconfig:/root/.gitconfig \
	-v $(HOME)/.ssh:/root/.ssh \
	--rm -ti $(PROJECT_NAME)