Precompile on the host

app.Dockerfile

FROM wshihadeh/rails-base-image-ruby:2.6.5-mysql

LABEL maintainer="Al-waleed Shihadeh <[email protected]>"

COPY ./docker-entrypoint.sh /
ENTRYPOINT ["/docker-entrypoint.sh"]

USER rails
WORKDIR /application

RUN bundle config build.nokogiri --use-system-libraries && \
    bundle config git.allow_insecure true && \
    bundle config set deployment 'true' && \
    bundle config set frozen 'true' && \
    bundle config set without 'development test' && \
    bundle install --quiet && \
    mkdir tmp/pids && \
    rm -rf vendor/cache/*.gem

CMD web

docker-compose.yml

version: '3.7'

services:

  mysql:
    image: mysql:5.7
    command: mysqld --general-log=1 --general-log-file=/var/log/mysql/general-log.log
    volumes:
      - db_data:/var/lib/mysql
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: dummy
      MYSQL_DATABASE: rails_blog_production

  rails_blog_web:
    build:
      context: rails_blog
      dockerfile: Dockerfile
    restart: always
    command: 'web'
    ports:
      - 8080:8080
    depends_on:
      - mysql
    environment:
      DATABASE_URL: mysql2://root:dummy@mysql/rails_blog_production

  web:
    build:
      context: .
      dockerfile: ./nginx/Dockerfile
    command: server
    ports:
      - 80:80

volumes:
  db_data:

nginx.conf

server {
    listen 80 default_server;
    server_name  blog.*;
    root   /var/www//public;
    index  index.html;

    location ~ /\. {
      deny all;
    }

    location ~* ^.+\.(rb|log)$ {
       deny all;
    }

    # serve static (compiled) assets directly if they exist (for rails production)
    location ~ ^/(assets|images|javascripts|stylesheets|swfs|system)/   {
      try_files $uri @rails;
      access_log off;
      gzip_static on;
      # to serve pre-gzipped version
      expires max;
      add_header Cache-Control public;

      add_header Last-Modified "";
      add_header ETag "";
      break;
    }

    location / {
       try_files $uri @rails;
    }

    location @rails {
        resolver 127.0.0.11 ipv6=off;

        set $target http://rails_blog_web:8080;

        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass $target;
    }
}

nginx.Dockerfile

From nginx:latest

LABEL maintainer="Al-waleed <[email protected]>"

COPY ./nginx/docker-entrypoint.sh /
ENTRYPOINT ["/docker-entrypoint.sh"]

COPY ./nginx/default.conf /etc/nginx/conf.d/default.conf
COPY ./nginx/nginx.conf /etc/nginx/nginx.conf

RUN mkdir /var/www/
WORKDIR /var/www/

COPY ./rails_blog/public public/