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Dockerfile
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# Global scope
ARG ENVIRONMENT_CONFIG=heroku
# Stage 1 - Create yarn install skeleton layer
FROM node:20-bookworm-slim@sha256:28fbbb764069c698ead61d6a739a7615e8f0e07a4b8fe1473ceca70c1c3d6aaa AS packages
ARG ENVIRONMENT_CONFIG
WORKDIR /app
COPY backstage.json package.json yarn.lock ./
COPY .yarn ./.yarn
COPY .yarnrc.yml ./
COPY packages packages
COPY plugins plugins
RUN find packages \! -name "package.json" -mindepth 2 -maxdepth 2 -print | xargs rm -rf
# Stage 2 - Install dependencies and build packages
FROM node:20-bookworm-slim@sha256:28fbbb764069c698ead61d6a739a7615e8f0e07a4b8fe1473ceca70c1c3d6aaa AS build
ARG ENVIRONMENT_CONFIG
# Set Python interpreter for `node-gyp` to use
ENV PYTHON=/usr/bin/python3
# Install sqlite3 dependencies. You can skip this if you don't use sqlite3 in the image,
# in which case you should also move better-sqlite3 to "devDependencies" in package.json.
RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
--mount=type=cache,target=/var/lib/apt,sharing=locked \
apt-get update && \
apt-get install -y --no-install-recommends libsqlite3-dev python3 g++ build-essential && \
rm -rf /var/lib/apt/lists/*
USER node
WORKDIR /app
COPY --from=packages --chown=node:node /app .
COPY --from=packages --chown=node:node /app/.yarn ./.yarn
COPY --from=packages --chown=node:node /app/.yarnrc.yml ./
COPY --from=packages --chown=node:node /app/backstage.json ./
RUN --mount=type=cache,target=/home/node/.cache/yarn,sharing=locked,uid=1000,gid=1000 \
yarn install --immutable
COPY --chown=node:node . .
RUN yarn tsc
RUN yarn --cwd packages/backend build
RUN mkdir packages/backend/dist/skeleton packages/backend/dist/bundle \
&& tar xzf packages/backend/dist/skeleton.tar.gz -C packages/backend/dist/skeleton \
&& tar xzf packages/backend/dist/bundle.tar.gz -C packages/backend/dist/bundle
# Stage 3 - Build the actual backend image and install production dependencies
FROM node:20-bookworm-slim@sha256:28fbbb764069c698ead61d6a739a7615e8f0e07a4b8fe1473ceca70c1c3d6aaa
ARG ENVIRONMENT_CONFIG
# Set Python interpreter for `node-gyp` to use
ENV PYTHON=/usr/bin/python3
# Install sqlite3 dependencies. You can skip this if you don't use sqlite3 in the image,
# in which case you should also move better-sqlite3 to "devDependencies" in package.json.
RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
--mount=type=cache,target=/var/lib/apt,sharing=locked \
apt-get update && \
apt-get install -y --no-install-recommends libsqlite3-dev g++ build-essential \
python3 python3-pip python3-venv \
curl default-jre graphviz fonts-dejavu fontconfig && \
rm -rf /var/lib/apt/lists/* && \
yarn config set python /usr/bin/python3
ENV VIRTUAL_ENV=/opt/venv
RUN python3 -m venv $VIRTUAL_ENV
ENV PATH="$VIRTUAL_ENV/bin:$PATH"
RUN pip3 install mkdocs-techdocs-core
RUN curl -o plantuml.jar -L https://github.com/plantuml/plantuml/releases/download/v1.2023.10/plantuml-1.2023.10.jar && echo "527d28af080ae91a455e7023e1a726c7714dc98e plantuml.jar" | sha1sum -c - && mv plantuml.jar /opt/plantuml.jar
RUN echo '#!/bin/sh\n\njava -jar '/opt/plantuml.jar' ${@}' >> /usr/local/bin/plantuml
RUN chmod 755 /usr/local/bin/plantuml
# From here on we use the least-privileged `node` user to run the backend.
USER node
# This should create the app dir as `node`.
# If it is instead created as `root` then the `tar` command below will fail: `can't create directory 'packages/': Permission denied`.
# If this occurs, then ensure BuildKit is enabled (`DOCKER_BUILDKIT=1`) so the app dir is correctly created as `node`.
WORKDIR /app
# Copy the install dependencies from the build stage and context
COPY --from=build --chown=node:node /app/.yarn ./.yarn
COPY --from=build --chown=node:node /app/.yarnrc.yml ./
COPY --from=build --chown=node:node /app/backstage.json ./
COPY --from=build --chown=node:node /app/yarn.lock /app/package.json /app/packages/backend/dist/skeleton/ ./
RUN --mount=type=cache,target=/home/node/.cache/yarn,sharing=locked,uid=1000,gid=1000 \
yarn workspaces focus --all --production
# Copy the built packages from the build stage
COPY --from=build --chown=node:node /app/packages/backend/dist/bundle/ ./
# Copy any other files that we need at runtime
COPY --chown=node:node app-config.yaml app-config.*.yaml ./
# Heroku will assign the port dynamically; the default value here will be overridden by what Heroku passes in
# For local development the default will be used
ENV PORT=7007
# This switches many Node.js dependencies to production mode.
ENV NODE_ENV=production
# Sets the max memory size of V8's old memory section
# Also disables node snapshot for Node 20 to work with the Scaffolder
ENV NODE_OPTIONS="--max-old-space-size=1000 --no-node-snapshot"
# Default is 'heroku', for local testing pass in 'local'
ENV ENVIRONMENT_CONFIG=${ENVIRONMENT_CONFIG}
CMD ["sh", "-c", "node packages/backend --config app-config.yaml --config app-config.${ENVIRONMENT_CONFIG}.yaml"]