Adding a docker-compose template for running Mastodon easily

.dockerignore

@@ -0,0 +1 @@
+.env

.env.production.sample

@@ -0,0 +1,5 @@
+REDIS_HOST=redis
+LOCAL_DOMAIN=example.com
+LOCAL_HTTPS=true
+PAPERCLIP_SECRET=
+SECRET_KEY_BASE=

.gitignore

@@ -17,3 +17,5 @@
 /tmp
 coverage
 public/system
+public/assets
+.env

Dockerfile

@@ -0,0 +1,15 @@
+FROM ruby:2.2.4
+
+ENV RAILS_ENV=production
+
+RUN apt-get update -qq && apt-get install -y build-essential libpq-dev
+RUN mkdir /mastodon
+
+WORKDIR /mastodon
+
+ADD Gemfile /mastodon/Gemfile
+ADD Gemfile.lock /mastodon/Gemfile.lock
+
+RUN bundle install --deployment --without test --without development
+
+ADD . /mastodon

README.md

@@ -15,12 +15,12 @@ Mastodon is a federated microblogging engine. An alternative implementation of t
 - Mentions and URLs converted to links in statuses
 - REST API, including home and mention timelines
 - OAuth2 provider system for the API
+- Upload header image for profile page
 
 Missing:
 
 - Media attachments (photos, videos)
 - UI to post, reblog, favourite, follow and unfollow
-- Upload header image for profile page
 - Deleting statuses, deletion propagation
 - Streaming API
 
@@ -34,3 +34,17 @@ Missing:
 
 - PostgreSQL
 - Redis
+
+## Running with Docker and Docker-Compose
+
+The project now includes a Dockerfile and a docker-compose.yml. You need to turn .env.production sample into .env.production with all the variables set before you can:
+
+    docker-compose build
+
+And finally
+
+    docker-compose up
+
+As usual, the first thing you would need to do would be to run migrations:
+
+    docker-compose run web rake db:migrate

config/database.yml

@@ -2,6 +2,7 @@ default: &default
   adapter: postgresql
   pool: 5
   timeout: 5000
+  encoding: unicode
 
 development:
   <<: *default
@@ -16,4 +17,7 @@ test:
 
 production:
   <<: *default
-  database: mastodon_production
+  database: postgres
+  username: postgres
+  password:
+  host: db

docker-compose.yml

@@ -0,0 +1,15 @@
+version: '2'
+services:
+  db:
+    image: postgres
+  redis:
+    image: redis
+  web:
+    build: .
+    command: bundle exec rails s -p 3000 -b '0.0.0.0'
+    ports:
+      - "3000:3000"
+    depends_on:
+      - db
+      - redis
+    env_file: .env.production