Dockerfile

# Stage 1 - compile repository
FROM nexus.nonprod.dwpcloud.uk:8082/library/node:12-alpine as compile
WORKDIR /usr/src/app
COPY . .
RUN npm set registry "https://nexus.nonprod.dwpcloud.uk/repository/npm-npmjs/" &&\
    npm install && npm run build

# Stage 1 - download only production dependencies
FROM nexus.nonprod.dwpcloud.uk:8082/library/node:12-alpine as install
WORKDIR /usr/src/app
COPY --from=compile /usr/src/app/package.json /usr/src/app/package-lock.json ./
RUN npm set registry "https://nexus.nonprod.dwpcloud.uk/repository/npm-npmjs/" &&\
    npm install --only=production

# Stage 3 - make clean staging area
FROM nexus.nonprod.dwpcloud.uk:8082/library/node:12-alpine as stage
WORKDIR /usr/src/app
COPY --from=install /usr/src/app/node_modules/   node_modules/
COPY --from=compile /usr/src/app/config/         config/
COPY --from=compile /usr/src/app/out/            out/
COPY --from=compile /usr/src/app/src/            src/
COPY --from=compile /usr/src/app/package*.json   ./

# Stage 4 - final copy!
FROM nexus.nonprod.dwpcloud.uk:8082/library/node:12-alpine as deploy
WORKDIR /usr/src/app
COPY --from=stage /usr/src/app ./
EXPOSE 8080
CMD [ "node", "./src/app.js" ]