1 app:
2     build: .
3
4     env_file: .env.production
5
6     environment:
7         RAILS_ENV: $RAILS_ENV
8
9     links:
10         - db
11

14     expose:
15         - "3000"
16
17 db:
18     image: postgres:9.4.5
19
20     volumes:
21         - eshop-postgres:/var/lib/postgresql/data
22
23 web:
24     build: .
25
26     dockerfile: config/containers/Dockerfile-nginx
27
28     volumes:
29         - ./public:/var/www/eshop/public
30
31     links:
32         - app
33     ports:
34         - "80:80"

2 FROM ruby:2.3.3-slim
     12 RUN apt-get update -qq && apt-get install -y build-essential libpq-dev postgresql-client libsqlite3-dev nodejs vim
     15 ENV RAILS_ROOT /var/www/myapp
     18 RUN mkdir -p $RAILS_ROOT/tmp/pids
     19
     21 WORKDIR $RAILS_ROOT
     22
     26 COPY Gemfile Gemfile
     27
     28 COPY Gemfile.lock Gemfile.lock
     29
     31 RUN gem install bundler
     32
     34 RUN bundle install
     35
     37 COPY . .
     38

     39 - RUN RAILS_ENV=production bundle exec rake assets:precompile --trace~
     40 - RUN bundle exec rake assets:precompile --trace~

     40 + RUN bundle exec rake RAILS_ENV=$RAILS_ENV DATABASE_URL=postgresql://$POSTGRES_USER:$POSTGRES_PASSWORD@127.0.0.1/$POSTGRES_PRODUCTION_DB assets:precompile
     41 + VOLUMES ["$RAILS_ROOT/public"]

     46 + CMD [ "config/containers/app_cmd.sh" ]

2 FROM nginx

     12 RUN apt-get update -qq && apt-get -y install apache2-utils vim

     15 ENV RAILS_ROOT /var/www/myapp

     18 WORKDIR $RAILS_ROOT

     21 RUN mkdir log

     25 COPY public public/

     28 COPY config/containers/nginx.conf /tmp/myapp.nginx

     32 RUN envsubst '$RAILS_ROOT' < /tmp/myappv.nginx > /etc/nginx/conf.d/default.conf

     35 CMD [ "nginx", "-g", "daemon off;" ]

40 RUN bundle exec rake RAILS_ENV=$RAILS_ENV DATABASE_URL=postgresql://$POSTGRES_USER:$POSTGRES_PASSWORD@127.0.0.1/$POSTGRES_PRODUCTION_DB assets:precompile
 41 VOLUME ["$RAILS_ROOT/public"]

 46 CMD [ "config/containers/app_cmd.sh" ]

# *.env.production*

RAILS_ENV=production
RAILS_ROOT=/var/www/eshop
SECRET_KEY_BASE=the_long_code
POSTGRES_PRODUCTION_DB=production_db
POSTGRES_USER=postgres
POSTGRES_PASSWORD=keep_secret_ps

web_1  | 2017/03/02 05:45:14 [warn] 1#1: server name "/var/www/eshop/public" has suspicious symbols in /etc/nginx/conf.d/default.conf:16
web_1  | nginx: [warn] server name "/var/www/eshop/public" has suspicious symbols in /etc/nginx/conf.d/default.conf:16

RUN bundle exec rake RAILS_ENV=production DATABASE_URL=postgresql://user:pass@127.0.0.1/dbname SECRET_TOKEN=makeupasecret assets:precompile

VOLUME ["$RAILS_ROOT/public"]

version: '2'
services:
  app:
    ...
    environment:
      - RAILS_SERVE_STATIC_FILES=true