Dockerfile

# syntax=docker/dockerfile:1

# Build
FROM node:22-alpine AS build

ARG DEBUG=false

WORKDIR /app

# Download dependencies as a separate step to take advantage of Docker's caching.
# Leverage a cache mount to /root/.npm to speed up subsequent builds.
# Leverage a bind mounts to package.json and package-lock.json to avoid having to copy them into
# into this layer.
RUN --mount=type=bind,source=package.json,target=package.json \
    --mount=type=bind,source=package-lock.json,target=package-lock.json \
    --mount=type=cache,target=/root/.npm \
    npm ci

# Copy the rest of the source files into the image.
COPY . .

# Conditional debug build
RUN if [ "$DEBUG" = "true" ]; then npm run build:debug; else npm run build; fi

# Production
FROM node:22-alpine AS production

ENV NODE_ENV=production

WORKDIR /app

COPY --from=build /app/dist ./dist

COPY package.json .

# Download dependencies as a separate step to take advantage of Docker's caching.
# Leverage a cache mount to /root/.npm to speed up subsequent builds.
# Leverage a bind mounts to package.json and package-lock.json to avoid having to copy them into
# into this layer.
RUN --mount=type=bind,source=package.json,target=package.json \
    --mount=type=bind,source=package-lock.json,target=package-lock.json \
    --mount=type=cache,target=/root/.npm \
    npm ci --omit=dev

EXPOSE 3000

# Run the application.
CMD ["npm", "start"]