Dockerfile

.dockerignore

@@ -0,0 +1,22 @@
+**/*Dockerfile
+.dockerignore
+.docker/
+docker-compose.yml
+.git
+.gitignore
+README.md
+VERSION
+
+/log/*
+/tmp/*
+!/log/.keep
+!/tmp/.keep
+/storage/*
+!/storage/.keep
+/node_modules
+/yarn-error.log
+/public/uploads
+/public/assets
+.byebug_history
+.idea/
+.env

Dockerfile

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+# syntax=docker/dockerfile:1
+
+FROM ruby:2.7.4-slim-buster AS Builder
+
+ARG RAILS_ENV=production
+
+ENV RAILS_ENV=${RAILS_ENV} \
+  APP_HOME=/home/app
+
+RUN apt-get update -qq \
+      && DEBIAN_FRONTEND=noninteractive apt-get install -yq --no-install-recommends curl git make gcc libpq-dev g++ shared-mime-info tzdata vim xz-utils automake pkg-config libtool libffi-dev libssl-dev libgmp-dev python-dev gnupg gnupg2
+
+WORKDIR $APP_HOME
+COPY Gemfile Gemfile.lock $APP_HOME/
+
+RUN gem update bundler --no-document
+RUN if [ "$RAILS_ENV" = "production" ]; then bundle config set --local without 'development:test:deploy'; fi
+RUN bundle config set --local system 'true' \
+      && bundle install --jobs=$(nproc) \
+      && bundle binstubs --all
+
+FROM Builder AS App
+# By default image is built using RAILS_ENV=production.
+# You may want to customize it:
+#
+#   --build-arg RAILS_ENV=development
+#
+# See https://docs.docker.com/engine/reference/commandline/build/#set-build-time-variables-build-arg
+#
+ARG RAILS_ENV=production
+
+# Devise requires secret key to be set during image build or it raises an error
+# preventing from running any scripts.
+# Users should override this variable by passing environment variable on container start.
+ENV RAILS_ENV=${RAILS_ENV} \
+  APP_HOME=/home/app
+
+# Create group "app" and user "app".
+RUN addgroup --gid 1000 --system app \
+      && adduser --system --home ${APP_HOME} --shell /sbin/nologin --ingroup app --uid 1000 app
+
+RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
+RUN echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list
+RUN curl -fsSL https://deb.nodesource.com/setup_16.x | bash - \
+      && apt-get install -y nodejs
+RUN apt-get update -qq && apt-get install -y build-essential yarn
+
+WORKDIR $APP_HOME
+COPY Gemfile Gemfile.lock $APP_HOME/
+
+# Install dependencies
+RUN if [ "$RAILS_ENV" = "production" ]; then bundle config set --local without 'development:test:deploy'; fi
+RUN bundle config set --local system 'true' \
+      && bundle install --jobs=$(nproc) \
+      && bundle binstubs --all
+
+RUN apt-get remove -yq git gcc g++ \
+      && chown -R app:app $APP_HOME
+
+USER app
+
+# Copy the main application.
+COPY --chown=app:app . $APP_HOME
+
+RUN yarn install --check-files
+RUN if [ "$RAILS_ENV" = "production" ]; then SECRET_KEY_BASE=secret SKIP_MANAGEMENT_API=true bundle exec rake assets:precompile; fi
+
+# Expose port 3000 to the Docker host, so we can access it
+# from the outside.
+EXPOSE 3000
+
+# The main command to run when the container starts. Also
+# tell the Rails dev server to bind to all interfaces by
+# default.
+# COPY --chown=app:app config/docker/docker-entrypoint.sh /
+# RUN chmod +x /docker-entrypoint.sh
+# ENTRYPOINT ["/docker-entrypoint.sh"]

Gemfile

@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
-ruby File.read('.ruby-version')
+ruby '2.7.4'
 
 gem 'dotenv-rails'
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails', branch: 'main'