Dockerfile

# Use the official Bun image
FROM oven/bun:1 as base
WORKDIR /usr/src/app

# Install dependencies into temp directory (cache them to 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 node_modules from temp directory and project files into 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 into final image
FROM base AS release
COPY --from=install /temp/prod/node_modules node_modules
COPY . .

# Run the app
USER bun
EXPOSE 3001/tcp
ENTRYPOINT [ "bun", "run", "src/index.ts" ]