Criar Dockerfile para rodar o ambiente completo

[fititnt]

Atualmente o projeto tem opção para rodar com Vagrant. Criar Dockerfile, ou pelo menos documentação sem exigir criação do arquivo, para permitir rodar o Jekyll sem instalar na máquina local.

[fititnt]

Ao tentar rodar usando o container oficial, com o comando

docker run --rm --label=jekyll --volume=$(pwd):/srv/jekyll \
  -it -p 127.0.0.1:4000:4000 jekyll/jekyll

Tenho alguns erros

# fititnt at bravo in /alligo/code/pokemongovet/casos-de-sucesso-na-adocao-de-animais on git:gh-pages o [22:11:28]
$ docker run --rm --label=jekyll --volume=$(pwd):/srv/jekyll \
  -it -p 127.0.0.1:4000:4000 jekyll/jekyll
Fetching gem metadata from https://rubygems.org/
Fetching version metadata from https://rubygems.org/
Fetching dependency metadata from https://rubygems.org/
Using i18n 0.7.0
Using json 1.8.3
Using minitest 5.9.0
Using thread_safe 0.3.5
Using addressable 2.4.0
Using coffee-script-source 1.10.0
Using execjs 2.7.0
Installing colorator 0.1
Installing ffi 1.9.10 with native extensions

Errno::EACCES: Permission denied @ dir_s_mkdir - /usr/lib/ruby/gems/2.3.0/extensions/x86_64-linux/2.3.0/ffi-1.9.10
Installing multipart-post 2.0.0
Using gemoji 2.1.0
Installing net-dns 0.8.0
Installing public_suffix 1.5.3
Using sass 3.4.22
Using rb-fsevent 0.9.7
Installing kramdown 1.10.0
Using liquid 3.0.6
Using mercenary 0.3.6
Installing rouge 1.10.1
Using safe_yaml 1.0.4
Installing jekyll-feed 0.5.1
Using mini_portile2 2.1.0
Using pkg-config 1.1.7
Using jekyll-paginate 1.1.0
Installing jekyll-sitemap 0.10.0
Installing terminal-table 1.6.0
Using bundler 1.12.5
Using tzinfo 1.2.2
Using coffee-script 2.4.1
An error occurred while installing ffi (1.9.10), and Bundler cannot continue.
Make sure that `gem install ffi -v '1.9.10'` succeeds before bundling.

(...)

Installing ffi 1.9.10 with native extensions

Errno::EACCES: Permission denied @ dir_s_mkdir - /usr/lib/ruby/gems/2.3.0/extensions/x86_64-linux/2.3.0/ffi-1.9.10

(...)

An error occurred while installing ffi (1.9.10), and Bundler cannot continue.
Make sure that `gem install ffi -v '1.9.10'` succeeds before bundling.

(...)

Isso pode ser um bug em https://github.com/jekyll/docker

$ cat /etc/*-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu 16.04.1 LTS"
NAME="Ubuntu"
VERSION="16.04.1 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.1 LTS"
VERSION_ID="16.04"