# Make sure RUBY_VERSION matches the Ruby version in .ruby-version
ARG RUBY_VERSION=3.2.5
FROM docker.io/library/ruby:$RUBY_VERSION-slim AS base
# Rails app lives here
WORKDIR /rails
# Install base packages
RUN apt-get update -qq && \
apt-get install --no-install-recommends -y curl libffi-dev libpq5 libjemalloc2 libvips sqlite3 && \
rm -rf /var/lib/apt/lists /var/cache/apt/archives
# Set production environment
ENV RAILS_ENV="production" \
BUNDLE_DEPLOYMENT="1" \
BUNDLE_PATH="/usr/local/bundle" \
BUNDLE_WITHOUT="development" \
POSTGRES_HOST="blog-postgres-1"
# Throw-away build stage to reduce size of final image
FROM base AS build
# Install packages needed to build gems
RUN apt-get update -qq && \
apt-get install --no-install-recommends -y libpq-dev build-essential git pkg-config && \
rm -rf /var/lib/apt/lists /var/cache/apt/archives
# Install application gems
COPY Gemfile Gemfile.lock ./
RUN bundle install && \
rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git && \
bundle exec bootsnap precompile --gemfile
# Copy application code
COPY . .
# Precompile bootsnap code for faster boot times
RUN bundle exec bootsnap precompile app/ lib/
# Precompiling assets for production without requiring secret RAILS_MASTER_KEY
RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile
# Final stage for app image
FROM base
# Copy built artifacts: gems, application
COPY --from=build "${BUNDLE_PATH}" "${BUNDLE_PATH}"
COPY --from=build /rails /rails
# Run and own only the runtime files as a non-root user for security
RUN groupadd --system --gid 1000 rails && \
useradd rails --uid 1000 --gid 1000 --create-home --shell /bin/bash && \
chown -R rails:rails db log storage tmp
USER 1000:1000
# Entrypoint prepares the database.
ENTRYPOINT ["/rails/bin/docker-entrypoint"]
# Start the server by default, this can be overwritten at runtime
EXPOSE 3000
CMD ["./bin/rails", "server"]
#################
compose.yml
name: blog
services:
nginx:
image: nginx:1.25.4-alpine
# Publish port 80 so, port 80 becomes accessible for external clients.
ports:
- "80:80"
- "443:443"
# Mount the volume `assets` at `/usr/share/nginx/html` path inside the Nginx container.
volumes:
- assets:/usr/share/nginx/html
configs:
# Mount the Nginx configuration file from Docker config nginx_config.
- source: nginx_config
target: /etc/nginx/conf.d/default.conf
networks:
- app
secrets:
- source: nginx_crt
target: /etc/nginx/nginx.crt
- source: nginx_key
target: /etc/nginx/nginx.key
depends_on:
- "railsapp"
railsapp:
image: walilahilhamdou/my-blog:3.0.0
environment:
POSTGRES_HOST: ${postgres_host}
volumes:
- assets:/rails/public
secrets:
- source: master_key_secret
target: /rails/config/master.key
expose:
- 3000
networks:
- app
- db
depends_on:
- "postgres"
postgres:
image: postgres:15.6
environment:
POSTGRES_USER: ${db_user}
POSTGRES_PASSWORD_FILE: /run/secrets/db_password
PGDATA: /db/data
volumes:
- db:/db/data
secrets:
- db_password
expose:
- 5432
networks:
- db
volumes:
db:
external: true
name: db
assets:
external: true
name: assets
networks:
db:
name: db
app:
name: app
secrets:
master_key_secret:
file: ./master.key
db_password:
file: ./db_password.txt
nginx_crt:
file: ./cert/nginx.crt
nginx_key:
file: ./cert/nginx.key
configs:
# Create Docker config from the ./nginx.conf file.
nginx_config:
file: ./nginx.conf
It seems you request root /, which is mapped to folder /usr/share/nginx/html/. There is probably no index.html file present and directory listing of content is forbidden by settings.
When you just need a reverse proxy to handle TLS and multiple services, just check nginx-proxy and acme-companion or simple Traefik example. They will use env or labels on target service/container to set up everything automatically.