added Docker support

Dockerfile

@@ -0,0 +1,13 @@
+FROM        apiaryio/jekyll
+MAINTAINER  Apiary SRE Team <sre@apiary.io>
+
+ENV REFRESHED_AT 2016-10-14
+
+ADD ./Gemfile /srv/jekyll/Gemfile
+ADD ./Gemfile.lock /srv/jekyll/Gemfile.lock
+
+WORKDIR /srv/jekyll
+RUN chown -R jekyll /srv/jekyll
+RUN bundle
+USER jekyll
+ENV LC_ALL C.UTF-8

Gemfile.lock

@@ -77,6 +77,3 @@ DEPENDENCIES
   jekyll-sitemap
   rake
   rouge
-
-BUNDLED WITH
-   1.12.5

README.md

@@ -19,12 +19,12 @@
 
 ## Running server using Docker
 
-If you don't want to set up Ruby ecosystem, you can preview all posts using Docker
+If you don't want to set up Ruby ecosystem, you can preview all posts using Docker:
 
-```bash
-$ docker run --rm --label=jekyll --volume=$(pwd):/srv/jekyll \
-  -it -p 127.0.0.1:4000:4000 jekyll/jekyll:pages
-```
+- run `./docker/build.sh` to build the `apiaryio/blog` image
+- run `./docker/serve.sh`
+
+The docker image only needs to be rebuilt if the dependencies change.
 
 ## Installing Dependencies
 

circle.yml

@@ -1,16 +1,30 @@
 machine:
-  ruby:
-    version: 2.3.1
-test:
+  services:
+    - docker
+
+dependencies:
+  cache_directories:
+    - "~/docker"
+
   override:
-    - sudo apt-get update
-    - sudo apt-get install libcurl3-dev
-    - bundle exec rake test
+    - docker info; mkdir -p ~/docker
+    - if [[ -e ~/docker/image.tar ]]; then docker load -i ~/docker/image.tar; fi
+    - ./docker/build.sh
+    - docker save apiaryio/blog > ~/docker/image.tar
+
 deployment:
   production:
     branch: master
     commands:
       - git config --global user.name "Apiary Bot"
       - git config --global user.email "support@apiary.io"
-      - git remote set-url origin "https://${GH_TOKEN}@github.com/apiaryio/apiaryio.github.com"
-      - rake deploy
+      - git remote set-url origin "https://${GH_TOKEN}@github.com/apiaryio/blog"
+      - docker run -e GH_TOKEN=$GH_TOKEN --volume=$(pwd):/srv/jekyll apiaryio/blog bash /srv/jekyll/deploy.sh
+test:
+  override:
+    - ./docker/run-tests.sh
+
+general:
+  branches:
+    ignore:
+      - gh-pages

deploy.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+git config --global user.name "Apiary Bot"
+git config --global user.email "support@apiary.io"
+git remote set-url origin "https://${GH_TOKEN}@github.com/apiaryio/apiaryio.github.com"
+bundle exec rake deploy

docker/build.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+docker build -t apiaryio/blog .

docker/run-tests.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+docker run --volume=$(pwd):/srv/jekyll apiaryio/blog bundle exec rake test

docker/serve.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+docker run --rm --volume=$(pwd):/srv/jekyll \
+  -it -p 4000:4000 apiaryio/blog \
+  jekyll serve -H 0.0.0.0 --watch --drafts --trace --force_polling