Estudologia Docker config

docker-compose-yml

version: "3.8"
services:
  web:
    build: .
    command: bash -c "rm -f tmp/pids/server.pid && bundle exec rails s -p 3000 -b '0.0.0.0'"
    volumes:
      - .:/estudologia-api
    ports:
      - "3000:3000"
    depends_on:
      - redis
    env_file:
      - .env
  redis:
    image: "redis:alpine"

Dockerfile

# Base image:
FROM ruby:3.1.3

ARG _WORKDIR=/estudologia-api
ARG PORT=3000

# Update and install JavaScript Runtime and PostgreSQL dependencies
RUN apt-get update -qq && apt-get install -y nodejs postgresql-client

# Create a new directory for the application in the container
RUN mkdir ${_WORKDIR}

# Set our working directory inside the image
WORKDIR ${_WORKDIR}

# Copy Gemfile and Gemfile.lock to the working directory
COPY Gemfile ${_WORKDIR}/Gemfile
COPY Gemfile.lock ${_WORKDIR}/Gemfile.lock

# Install the app dependencies
RUN bundle install

# Copy the rest of the application into the working directory
COPY . /estudologia-api

# Add a script to be executed every time the container starts.
COPY entrypoint.sh /usr/bin/
RUN chmod +x /usr/bin/entrypoint.sh
ENTRYPOINT ["entrypoint.sh"]

# Expose port in the container
EXPOSE ${PORT}

# Configure the main process to run when running the image
CMD ["rails", "server", "-b", "0.0.0.0"]

entrypoint.sh

#!/bin/bash
set -e

# Remove a potentially pre-existing server.pid for Rails.
rm -f /myapp/tmp/pids/server.pid

# Then exec the container's main process (what's set as CMD in the Dockerfile).
exec bundle exec rails db:migrate &
exec "$@"