fly.Dockerfile

# syntax = docker/dockerfile:experimental

# Dockerfile used to build a deployable image for a Rails application.
# Adjust as required.
#
# Common adjustments you may need to make over time:
#  * Modify version numbers for Ruby, Bundler, and other products.
#  * Add library packages needed at build time for your gems, node modules.
#  * Add deployment packages needed by your application
#  * Add (often fake) secrets needed to compile your assets

#######################################################################

# Learn more about the chosen Ruby stack, Fullstaq Ruby, here:
#   https://github.com/evilmartians/fullstaq-ruby-docker.
#
# We recommend using the highest patch level for better security and
# performance.

ARG RUBY_VERSION
ARG VARIANT=jemalloc-bullseye-slim
FROM quay.io/evl.ms/fullstaq-ruby:${RUBY_VERSION}-${VARIANT} AS base

SHELL ["/bin/bash", "-o", "pipefail", "-c"]

# hadolint ignore=DL3048
LABEL fly_launch_runtime="rails"

ARG NODE_VERSION=18.*
ARG YARN_VERSION=4.0.2
ARG BUNDLER_VERSION=2.5.16

ARG RAILS_ENV=production
ENV RAILS_ENV=${RAILS_ENV}

ENV RAILS_SERVE_STATIC_FILES=true
ENV RAILS_LOG_TO_STDOUT=true

ARG BUNDLE_WITHOUT=development:test
ARG BUNDLE_PATH=vendor/bundle
ENV BUNDLE_PATH=${BUNDLE_PATH}
ENV BUNDLE_WITHOUT=${BUNDLE_WITHOUT}

RUN mkdir /app
WORKDIR /app
RUN mkdir -p tmp/pids

RUN curl https://get.volta.sh | bash
ENV VOLTA_HOME=/root/.volta
ENV PATH=$VOLTA_HOME/bin:/usr/local/bin:$PATH
RUN volta install node@${NODE_VERSION} yarn@${YARN_VERSION} && \
    gem update --system --no-document && \
    gem install -N bundler -v ${BUNDLER_VERSION}

#######################################################################

# install packages only needed at build time

FROM base AS build_deps

ARG BUILD_PACKAGES="build-essential=12.* libpq-dev=13.* libyaml-dev=0.2.*"
ENV BUILD_PACKAGES=${BUILD_PACKAGES}

# hadolint ignore=DL3008
RUN --mount=type=cache,id=dev-apt-cache,sharing=locked,target=/var/cache/apt \
    --mount=type=cache,id=dev-apt-lib,sharing=locked,target=/var/lib/apt \
    apt-get update -q && \
    apt-get install --no-install-recommends -y ${BUILD_PACKAGES} \
    && rm -rf /var/lib/apt/lists /var/cache/apt/archives

#######################################################################

# install gems

FROM build_deps AS gems

COPY Gemfile Gemfile.lock .ruby-version ./
RUN bundle install && \
    rm -rf vendor/bundle/ruby/*/cache

#######################################################################

# install node modules

FROM build_deps AS node_modules

COPY package.json yarn.lock .yarnrc.yml ./
COPY .yarn/releases/ ./.yarn/releases/
RUN yarn workspaces focus --all --production

#######################################################################

# install deployment packages

FROM base

ARG DEPLOY_PACKAGES="postgresql-client-13=13.*"
ENV DEPLOY_PACKAGES=${DEPLOY_PACKAGES}

# hadolint ignore=DL3008
RUN --mount=type=cache,id=prod-apt-cache,sharing=locked,target=/var/cache/apt \
    --mount=type=cache,id=prod-apt-lib,sharing=locked,target=/var/lib/apt \
    apt-get update -q && \
    apt-get install --no-install-recommends -y \
    ${DEPLOY_PACKAGES} \
    && rm -rf /var/lib/apt/lists /var/cache/apt/archives

# copy installed gems
COPY --from=gems /app /app
COPY --from=gems /usr/lib/fullstaq-ruby/versions /usr/lib/fullstaq-ruby/versions
COPY --from=gems /usr/local/bundle /usr/local/bundle

# copy installed node modules
COPY --from=node_modules /app/node_modules /app/node_modules

#######################################################################

# Deploy your application
COPY . .

# Adjust binstubs to run on Linux and set current working directory
RUN chmod +x /app/bin/* && \
    sed -i 's/ruby.exe/ruby/' /app/bin/* && \
    sed -i '/^#!/aDir.chdir File.expand_path("..", __dir__)' /app/bin/*

# The following enable assets to precompile on the build server.  Adjust
# as necessary.  If no combination works for you, see:
# https://fly.io/docs/rails/getting-started/existing/#access-to-environment-variables-at-build-time
ENV SECRET_KEY_BASE=1
# ENV AWS_ACCESS_KEY_ID=1
# ENV AWS_SECRET_ACCESS_KEY=1

# Run build task defined in lib/tasks/fly.rake
ARG BUILD_COMMAND="bin/rails fly:build"
RUN ${BUILD_COMMAND}

# Default server start instructions.  Generally Overridden by fly.toml.
ENV PORT=8080
ARG SERVER_COMMAND="bin/rails fly:server"
ENV SERVER_COMMAND=${SERVER_COMMAND}
# hadolint ignore=DL3025
CMD ${SERVER_COMMAND}