handles mime magic

.env

@@ -0,0 +1,5 @@
+DATABASE_NAME=rails_development
+DATABASE_USER=sammy
+DATABASE_PASSWORD=shark
+DATABASE_HOST=database
+REDIS_HOST=redis

Dockerfile

@@ -0,0 +1,49 @@
+FROM ruby:2.5.1-alpine
+
+ENV BUNDLER_VERSION=2.0.2
+
+RUN apk add --update --no-cache \
+      binutils-gold \
+      build-base \
+      curl \
+      file \
+      g++ \
+      gcc \
+      git \
+      less \
+      libstdc++ \
+      libffi-dev \
+      libc-dev \
+      linux-headers \
+      libxml2-dev \
+      libxslt-dev \
+      libgcrypt-dev \
+      make \
+      netcat-openbsd \
+      nodejs \
+      openssl \
+      pkgconfig \
+      postgresql-dev \
+      python \
+      tzdata \
+      yarn
+
+RUN gem install bundler -v 2.0.2
+
+WORKDIR /app
+
+COPY Gemfile Gemfile.lock ./
+
+RUN bundle config build.nokogiri --use-system-libraries
+
+RUN bundle check || bundle install
+
+COPY package.json yarn.lock ./
+
+RUN yarn install --check-files
+
+COPY . ./
+
+RUN bundle exec rake webpacker:compile
+
+CMD ["./entrypoints/docker-entrypoint.sh"]

Gemfile

@@ -6,7 +6,7 @@ ruby '2.5.1'
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 5.2.3'
 # Use sqlite3 as the database for Active Record
-gem 'sqlite3'
+# gem 'sqlite3'
 # Use Puma as the app server
 gem 'puma', '~> 3.12'
 # Use SCSS for stylesheets
@@ -38,6 +38,7 @@ gem 'jbuilder', '~> 2.5'
 # Reduces boot times through caching; required in config/boot.rb
 gem 'bootsnap', '>= 1.1.0', require: false
 gem 'sidekiq', '~>6.0.0'
+gem 'pg', '~>1.1.3'
 
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
@@ -50,7 +51,7 @@ group :development do
   gem 'listen', '>= 3.0.5', '< 3.2'
   # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
   gem 'spring'
-  gem 'spring-watcher-listen', '~> 2.0.0'
+  # gem 'spring-watcher-listen', '~> 2.0.0'
 end
 
 group :test do

Gemfile.lock

@@ -1,43 +1,43 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (5.2.3)
-      actionpack (= 5.2.3)
+    actioncable (5.2.6)
+      actionpack (= 5.2.6)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
-    actionmailer (5.2.3)
-      actionpack (= 5.2.3)
-      actionview (= 5.2.3)
-      activejob (= 5.2.3)
+    actionmailer (5.2.6)
+      actionpack (= 5.2.6)
+      actionview (= 5.2.6)
+      activejob (= 5.2.6)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (5.2.3)
-      actionview (= 5.2.3)
-      activesupport (= 5.2.3)
-      rack (~> 2.0)
+    actionpack (5.2.6)
+      actionview (= 5.2.6)
+      activesupport (= 5.2.6)
+      rack (~> 2.0, >= 2.0.8)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.2.3)
-      activesupport (= 5.2.3)
+    actionview (5.2.6)
+      activesupport (= 5.2.6)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activejob (5.2.3)
-      activesupport (= 5.2.3)
+    activejob (5.2.6)
+      activesupport (= 5.2.6)
       globalid (>= 0.3.6)
-    activemodel (5.2.3)
-      activesupport (= 5.2.3)
-    activerecord (5.2.3)
-      activemodel (= 5.2.3)
-      activesupport (= 5.2.3)
+    activemodel (5.2.6)
+      activesupport (= 5.2.6)
+    activerecord (5.2.6)
+      activemodel (= 5.2.6)
+      activesupport (= 5.2.6)
       arel (>= 9.0)
-    activestorage (5.2.3)
-      actionpack (= 5.2.3)
-      activerecord (= 5.2.3)
-      marcel (~> 0.3.1)
-    activesupport (5.2.3)
+    activestorage (5.2.6)
+      actionpack (= 5.2.6)
+      activerecord (= 5.2.6)
+      marcel (~> 1.0.0)
+    activesupport (5.2.6)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
@@ -50,7 +50,7 @@ GEM
     bindex (0.8.1)
     bootsnap (1.4.5)
       msgpack (~> 1.0)
-    builder (3.2.3)
+    builder (3.2.4)
     byebug (11.0.1)
     capybara (3.29.0)
       addressable
@@ -72,17 +72,17 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.1.9)
     connection_pool (2.2.2)
-    crass (1.0.5)
-    erubi (1.9.0)
+    crass (1.0.6)
+    erubi (1.10.0)
     execjs (2.7.0)
     ffi (1.11.1)
     font-awesome-rails (4.7.0.5)
       railties (>= 3.2, < 6.1)
-    globalid (0.4.2)
-      activesupport (>= 4.2.0)
-    i18n (1.6.0)
+    globalid (0.5.2)
+      activesupport (>= 5.0)
+    i18n (1.8.10)
       concurrent-ruby (~> 1.0)
     io-like (0.3.0)
     jbuilder (2.9.1)
@@ -91,52 +91,53 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
-    loofah (2.3.1)
+    loofah (2.12.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)
       mini_mime (>= 0.1.1)
-    marcel (0.3.3)
-      mimemagic (~> 0.3.2)
-    method_source (0.9.2)
-    mimemagic (0.3.3)
-    mini_mime (1.0.2)
-    mini_portile2 (2.4.0)
-    minitest (5.12.0)
+    marcel (1.0.2)
+    method_source (1.0.0)
+    mini_mime (1.1.2)
+    mini_portile2 (2.6.1)
+    minitest (5.14.4)
     msgpack (1.3.1)
-    nio4r (2.5.2)
-    nokogiri (1.10.5)
-      mini_portile2 (~> 2.4.0)
+    nio4r (2.5.8)
+    nokogiri (1.12.5)
+      mini_portile2 (~> 2.6.1)
+      racc (~> 1.4)
+    pg (1.1.4)
     public_suffix (4.0.1)
     puma (3.12.2)
-    rack (2.0.8)
+    racc (1.6.0)
+    rack (2.2.3)
     rack-protection (2.0.7)
       rack
     rack-proxy (0.6.5)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
-    rails (5.2.3)
-      actioncable (= 5.2.3)
-      actionmailer (= 5.2.3)
-      actionpack (= 5.2.3)
-      actionview (= 5.2.3)
-      activejob (= 5.2.3)
-      activemodel (= 5.2.3)
-      activerecord (= 5.2.3)
-      activestorage (= 5.2.3)
-      activesupport (= 5.2.3)
+    rails (5.2.6)
+      actioncable (= 5.2.6)
+      actionmailer (= 5.2.6)
+      actionpack (= 5.2.6)
+      actionview (= 5.2.6)
+      activejob (= 5.2.6)
+      activemodel (= 5.2.6)
+      activerecord (= 5.2.6)
+      activestorage (= 5.2.6)
+      activesupport (= 5.2.6)
       bundler (>= 1.3.0)
-      railties (= 5.2.3)
+      railties (= 5.2.6)
       sprockets-rails (>= 2.0.0)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.2.0)
-      loofah (~> 2.2, >= 2.2.2)
-    railties (5.2.3)
-      actionpack (= 5.2.3)
-      activesupport (= 5.2.3)
+    rails-html-sanitizer (1.4.2)
+      loofah (~> 2.3)
+    railties (5.2.6)
+      actionpack (= 5.2.6)
+      activesupport (= 5.2.6)
       method_source
       rake (>= 0.8.7)
       thor (>= 0.19.0, < 2.0)
@@ -168,24 +169,20 @@ GEM
       rack-protection (>= 2.0.0)
       redis (>= 4.1.0)
     spring (2.1.0)
-    spring-watcher-listen (2.0.1)
-      listen (>= 2.7, < 4.0)
-      spring (>= 1.2, < 3.0)
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    sprockets-rails (3.2.1)
+    sprockets-rails (3.2.2)
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
-    sqlite3 (1.4.1)
-    thor (0.20.3)
+    thor (1.1.0)
     thread_safe (0.3.6)
     tilt (2.0.10)
     turbolinks (5.2.1)
       turbolinks-source (~> 5.2)
     turbolinks-source (5.2.0)
-    tzinfo (1.2.5)
+    tzinfo (1.2.9)
       thread_safe (~> 0.1)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
@@ -198,9 +195,9 @@ GEM
       activesupport (>= 4.2)
       rack-proxy (>= 0.6.1)
       railties (>= 4.2)
-    websocket-driver (0.7.1)
+    websocket-driver (0.7.5)
       websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.4)
+    websocket-extensions (0.1.5)
     xpath (3.2.0)
       nokogiri (~> 1.8)
 
@@ -216,14 +213,13 @@ DEPENDENCIES
   font-awesome-rails (~> 4.x)
   jbuilder (~> 2.5)
   listen (>= 3.0.5, < 3.2)
+  pg (~> 1.1.3)
   puma (~> 3.12)
   rails (~> 5.2.3)
   sass-rails (~> 5.0)
   selenium-webdriver
   sidekiq (~> 6.0.0)
   spring
-  spring-watcher-listen (~> 2.0.0)
-  sqlite3
   turbolinks (~> 5)
   tzinfo-data
   uglifier (>= 1.3.0)

README.md

@@ -1 +1 @@
-Sample project demonstrating how to integrate Sidekiq and Redis into an existing Rails project, as described in [How To Add Sidekiq and Redis to a Ruby on Rails Application](https://www.digitalocean.com/community/tutorials/how-to-add-sidekiq-and-redis-to-a-ruby-on-rails-application)
+Sample project demonstrating how to use Docker Compose to containerize a Ruby on Rails application, as described in [Containerizing a Ruby on Rails Application for Development with Docker Compose](https://www.digitalocean.com/community/tutorials/containerizing-a-ruby-on-rails-application-for-development-with-docker-compose).

config/database.yml

@@ -5,21 +5,25 @@
 #   gem 'sqlite3'
 #
 default: &default
-  adapter: sqlite3
+  adapter: postgresql
+  encoding: unicode
+  database: <%= ENV['DATABASE_NAME'] %>
+  username: <%= ENV['DATABASE_USER'] %>
+  password: <%= ENV['DATABASE_PASSWORD'] %>
+  port: <%= ENV['DATABASE_PORT'] || '5432' %>
+  host: <%= ENV['DATABASE_HOST'] %>
   pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
   timeout: 5000
 
 development:
   <<: *default
-  database: db/development.sqlite3
+
 
 # Warning: The database defined as "test" will be erased and
 # re-generated from your development database when you run "rake".
 # Do not set this db to the same as development or production.
 test:
   <<: *default
-  database: db/test.sqlite3
 
 production:
   <<: *default
-  database: db/production.sqlite3

config/initializers/sidekiq.rb

@@ -0,0 +1,13 @@
+Sidekiq.configure_server do |config|
+  config.redis = {
+    host: ENV['REDIS_HOST'],
+    port: ENV['REDIS_PORT'] || '6379'
+  }
+end
+
+Sidekiq.configure_client do |config|
+  config.redis = {
+    host: ENV['REDIS_HOST'],
+    port: ENV['REDIS_PORT'] || '6379'
+  }
+end

db/schema.rb

@@ -12,6 +12,9 @@
 
 ActiveRecord::Schema.define(version: 2019_11_20_132043) do
 
+  # These are extensions that must be enabled in order to support this database
+  enable_extension "plpgsql"
+
   create_table "endangereds", force: :cascade do |t|
     t.string "name"
     t.string "iucn"

db/seeds.rb

@@ -1,7 +1,3 @@
-# This file should contain all the record creation needed to seed the database with its default values.
-# The data can then be loaded with the rails db:seed command (or created alongside the database with db:setup).
-#
-# Examples:
-#
-#   movies = Movie.create([{ name: 'Star Wars' }, { name: 'Lord of the Rings' }])
-#   Character.create(name: 'Luke', movie: movies.first)
+# Adding demo sharks
+sharks = Shark.create([{ name: 'Great White', facts: 'Scary' }, { name: 'Megalodon', facts: 'Ancient' }, { name: 'Hammerhead', facts: 'Hammer-like' }, { name: 'Speartooth', facts: 'Endangered' }])
+Post.create(body: 'These sharks are misunderstood', shark: sharks.first)