71 lines
2.4 KiB
Docker
71 lines
2.4 KiB
Docker
# syntax=docker/dockerfile:1
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# Comments are provided throughout this file to help you get started.
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# If you need more help, visit the Dockerfile reference guide at
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# https://docs.docker.com/go/dockerfile-reference/
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ARG NODE_VERSION=21.6.2
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################################################################################
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# Use node image for base image for all stages.
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FROM node:${NODE_VERSION}-alpine as base
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# Set working directory for all build stages.
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WORKDIR /usr/src/app
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################################################################################
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# Create a stage for installing production dependecies.
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FROM base as deps
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# Download dependencies as a separate step to take advantage of Docker's caching.
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# Leverage a cache mount to /root/.npm to speed up subsequent builds.
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# Leverage bind mounts to package.json and package-lock.json to avoid having to copy them
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# into this layer.
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RUN --mount=type=bind,source=package.json,target=package.json \
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--mount=type=bind,source=package-lock.json,target=package-lock.json \
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--mount=type=cache,target=/root/.npm \
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npm ci --omit=dev
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################################################################################
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# Create a stage for building the application.
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FROM deps as build
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# Download additional development dependencies before building, as some projects require
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# "devDependencies" to be installed to build. If you don't need this, remove this step.
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RUN --mount=type=bind,source=package.json,target=package.json \
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--mount=type=bind,source=package-lock.json,target=package-lock.json \
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--mount=type=cache,target=/root/.npm \
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npm ci
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# Copy the rest of the source files into the image.
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COPY . .
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# Run the build script.
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RUN npm run build
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################################################################################
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# Create a new stage to run the application with minimal runtime dependencies
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# where the necessary files are copied from the build stage.
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FROM base as final
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# Use production node environment by default.
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ENV NODE_ENV production
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# Run the application as a non-root user.
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USER node
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# Copy package.json so that package manager commands can be used.
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COPY package.json .
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# Copy the production dependencies from the deps stage and also
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# the built application from the build stage into the image.
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COPY --from=deps /node_modules ./node_modules
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COPY --from=build /prod ./prod
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# Expose the port that the application listens on.
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EXPOSE 3000
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# Run the application.
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CMD npm start
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