mastodon/streaming/Dockerfile

# syntax=docker/dockerfile:1.4

# Please see https://docs.docker.com/engine/reference/builder for information about
# the extended buildx capabilities used in this file.
# Make sure multiarch TARGETPLATFORM is available for interpolation
# See: https://docs.docker.com/build/building/multi-platform/
ARG TARGETPLATFORM=${TARGETPLATFORM}
ARG BUILDPLATFORM=${BUILDPLATFORM}

# Node version to use in base image, change with [--build-arg NODE_MAJOR_VERSION="20"]
ARG NODE_MAJOR_VERSION="20"
# Debian image to use for base image, change with [--build-arg DEBIAN_VERSION="bookworm"]
ARG DEBIAN_VERSION="bookworm"
# Node image to use for base image based on combined variables (ex: 20-bookworm-slim)
FROM docker.io/node:${NODE_MAJOR_VERSION}-${DEBIAN_VERSION}-slim as streaming

# Timezone used by the Docker container and runtime, change with [--build-arg TZ=Europe/Berlin]
ARG TZ="Etc/UTC"
# Linux UID (user id) for the mastodon user, change with [--build-arg UID=1234]
ARG UID="991"
# Linux GID (group id) for the mastodon user, change with [--build-arg GID=1234]
ARG GID="991"

# Apply Mastodon build options based on options above
ENV \
# Apply Mastodon version information
  MASTODON_VERSION_PRERELEASE="${MASTODON_VERSION_PRERELEASE}" \
  MASTODON_VERSION_METADATA="${MASTODON_VERSION_METADATA}" \
# Apply timezone
  TZ=${TZ}

ENV \
# Configure the IP to bind Mastodon to when serving traffic
  BIND="0.0.0.0" \
# Explicitly set PORT to match the exposed port
  PORT=4000 \
# Use production settings for Yarn, Node and related nodejs based tools
  NODE_ENV="production" \
# Add Ruby and Mastodon installation to the PATH
  DEBIAN_FRONTEND="noninteractive"

# Set default shell used for running commands
SHELL ["/bin/bash", "-o", "pipefail", "-o", "errexit", "-c"]

ARG TARGETPLATFORM

RUN echo "Target platform is ${TARGETPLATFORM}"

RUN \
# Remove automatic apt cache Docker cleanup scripts
  rm -f /etc/apt/apt.conf.d/docker-clean; \
# Sets timezone
  echo "${TZ}" > /etc/localtime; \
# Creates mastodon user/group and sets home directory
  groupadd -g "${GID}" mastodon; \
  useradd -l -u "${UID}" -g "${GID}" -m -d /opt/mastodon mastodon; \
# Creates symlink for /mastodon folder
  ln -s /opt/mastodon /mastodon;

# hadolint ignore=DL3008,DL3005
RUN \
# Mount Apt cache and lib directories from Docker buildx caches
--mount=type=cache,id=apt-cache-${TARGETPLATFORM},target=/var/cache/apt,sharing=locked \
--mount=type=cache,id=apt-lib-${TARGETPLATFORM},target=/var/lib/apt,sharing=locked \
# Upgrade to check for security updates to Debian image
  apt-get update; \
  apt-get dist-upgrade -yq; \
  apt-get install -y --no-install-recommends \
    ca-certificates \
    curl \
    tzdata \
  ;

# Set /opt/mastodon as working directory
WORKDIR /opt/mastodon

# Copy Node package configuration files from build system to container
COPY package.json yarn.lock .yarnrc.yml /opt/mastodon/
COPY .yarn /opt/mastodon/.yarn
# Copy Streaming source code from build system to container
COPY ./streaming /opt/mastodon/streaming

RUN \
# Mount local Corepack and Yarn caches from Docker buildx caches
--mount=type=cache,id=corepack-cache-${TARGETPLATFORM},target=/usr/local/share/.cache/corepack,sharing=locked \
--mount=type=cache,id=yarn-cache-${TARGETPLATFORM},target=/usr/local/share/.cache/yarn,sharing=locked \
  # Configure Corepack
  rm /usr/local/bin/yarn*; \
  corepack enable; \
  corepack prepare --activate;

RUN \
# Mount Corepack and Yarn caches from Docker buildx caches
--mount=type=cache,id=corepack-cache-${TARGETPLATFORM},target=/usr/local/share/.cache/corepack,sharing=locked \
--mount=type=cache,id=yarn-cache-${TARGETPLATFORM},target=/usr/local/share/.cache/yarn,sharing=locked \
# Install Node packages
  yarn workspaces focus --production @mastodon/streaming;

# Set the running user for resulting container
USER mastodon
# Expose default Streaming ports
EXPOSE 4000
# Run streaming when started
CMD [ node ./streaming/index.js ]