Distroless NodeJS + Typescript

Dockerfile

## Kodo multi-stage docker image ##

# build project with typescript
FROM node:16.15.1-stretch as ts-compiler
WORKDIR /app
COPY package*.json ./
COPY tsconfig*.json ./
RUN npm install
COPY . ./
RUN npm run build

# retrieve only build artifact (no need typescript toolchain) and install prod dependencies
FROM node:16.15.1-stretch as ts-remover
WORKDIR /app
COPY --from=ts-compiler /app/package*.json ./
COPY --from=ts-compiler /app/dist/src ./dist
COPY --from=ts-compiler /app/src/config ./dist/config
COPY scripts/entrypoint.sh ./entrypoint.sh
RUN npm install --omit=dev

# run the app in distroless container to reduce size
FROM gcr.io/distroless/nodejs:16
WORKDIR /app
COPY --from=ts-remover /app ./
USER 1000
EXPOSE 3000
# default env, overriden by CI variables or manual build
ARG env=dev
ARG redis_alert_cn
ARG redis_push_cn
ENV NODE_ENV=$env
ENV REDIS_ALERT_CN=$redis_alert_cn
ENV REDIS_PUSH_CN=$redis_push_cn
ENV DEBUG=kodo:*
CMD ["dist/app.js"]