Docker config

gistfile1.txt

# Docker compose
```
version: "3.0"
services:
  redis:
    image: redis:alpine
    restart: unless-stopped
    ports:
      - "6379:6379"
    expose:
      - "6379"
    volumes:
      - $PWD/redis-data:/var/lib/redis
      - $PWD/redis.conf:/usr/local/etc/redis/redis.conf
    environment:
      - 'API_PORT=6379'
      - 'NODE_ENV=production'
  db:
    image: postgres:11
    ports:
      - 5432:5432
    environment:
      POSTGRES_PASSWORD: '123456'

  webpacker:
    image: counter-server
    command: ["./scripts/start_webpack_dev.sh"]
    volumes:
      - .:/opt/counter_server:cached
    ports:
      - 3035:3035

  web:
    image: counter-server
    env_file:
      - ./.env.docker  
    build:
      context: .
      args:
        precompileassets: "not"
    command: web
    links:
      - db
      - webpacker
    ports:
      - 3000:3000
    volumes:
      - .:/opt/counter_server:cached
  crontab:
    image: counter-server
    env_file:
      - ./.env.docker
    command: cron_jobs
  djs:
    image: counter-server
    env_file:
      - ./.env.docker  
    command: delayed_jobs
  
  
 ```
 
 Dockerfile
 ```
 FROM ruby:2.7.1-slim
ARG precompileassets

RUN apt-get update && apt-get install -y curl gnupg
RUN echo "deb http://apt.postgresql.org/pub/repos/apt/ stretch-pgdg main" > /etc/apt/sources.list.d/pgdg.list
RUN curl -q https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -

RUN apt-get -y update && \
      apt-get install --fix-missing --no-install-recommends -qq -y \
        build-essential \
        vim \
        wget gnupg \
        git-all \
        curl \
        cron \
        ssh \
        postgresql-client-11 libpq5 libpq-dev -y && \
      wget -qO- https://deb.nodesource.com/setup_12.x  | bash - && \
      apt-get install -y nodejs && \
      wget -qO- https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - && \
      echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list && \
      apt-get update && \
      apt-get install yarn && \
      apt-get clean && \
      rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

RUN gem install bundler -v 2.1.4
#Install gems
RUN mkdir /gems
WORKDIR /gems
COPY Gemfile .
COPY Gemfile.lock .
RUN bundle install
COPY config/webpacker.docker.yml config/webpacker.yml

ARG INSTALL_PATH=/opt/counter-server
ENV INSTALL_PATH $INSTALL_PATH
WORKDIR $INSTALL_PATH
COPY ./entrypoint.sh /
ENTRYPOINT ["/entrypoint.sh"]

COPY . .

RUN scripts/potential_asset_precompile.sh $precompileassets

EXPOSE 3000
```

entrypoint
```
#!/bin/sh
rm -f tmp/pids/server.pid

set -e

case $1 in

  web)
    exec su -s /bin/sh -c "bundle exec rails server -b 0.0.0.0"
  ;;

  migrations)
    exec su -s /bin/sh -c "bundle exec rake db:migrate"
  ;;

  delayed_jobs)
    exec su -s /bin/sh -c "bundle exec sidekiq"
  ;;

  cron_jobs)
    bundle exec whenever --update-crontab && cron -f
  ;;

  *)
    exec "$@"
  ;;

esac

exit 0
```