Dockerfile

# Use the official Bun image
# See all versions at https://hub.docker.com/r/oven/bun/tags
FROM oven/bun:1 AS base
WORKDIR /usr/src/app

# Install dependencies in a temporary directory
# This will cache them and speed up future builds
FROM base AS install
RUN mkdir -p /temp/dev
COPY package.json bun.lockb /temp/dev/
RUN cd /temp/dev && bun install --frozen-lockfile

# Install with --production (exclude devDependencies)
RUN mkdir -p /temp/prod
COPY package.json bun.lockb /temp/prod/
RUN cd /temp/prod && bun install --frozen-lockfile --production

# Copy the temporary directory to the image
FROM base AS prerelease
COPY --from=install /temp/dev/node_modules node_modules
COPY . .

# [optional] tests & build
ENV NODE_ENV=production
RUN bun test
RUN bun run build

# Copy production dependencies and source code to the final image
FROM base AS release
COPY --from=install /temp/prod/node_modules node_modules
COPY --from=prerelease /usr/src/app/dist dist
COPY --from=prerelease /usr/src/app/package.json .

# Set the bun user
USER bun

# Expose port 4000
EXPOSE 4000

# Set the default command for production
CMD ["bun", "run", "dist/index.js"]