$ time docker-compose build client
Building client
Step 1/9 : FROM node:9 AS build
 ---> 814364d36f69
Step 2/9 : WORKDIR /srv
 ---> Using cache
 ---> 031927a1a5ab
Step 3/9 : ADD package.json .
 ---> Using cache
 ---> 9cd95ef4d4ce
Step 4/9 : RUN npm install
 ---> Using cache
 ---> 578f2df9a49a
Step 5/9 : FROM node:9-slim
 ---> 671cff4d77bb
Step 6/9 : COPY --from=build /srv .
 ---> Using cache
 ---> 5ec814c8004a
Step 7/9 : ADD . .
 ---> 03c82c7cdc42
Step 8/9 : EXPOSE 3000
 ---> Running in 435d2c5749f7
Removing intermediate container 435d2c5749f7
 ---> ac4a79de37c1
Step 9/9 : CMD ["node", "index.js"]
 ---> Running in e4eb0cfda0ae
Removing intermediate container e4eb0cfda0ae
 ---> 5507592e1cfd
Successfully built 5507592e1cfd
Successfully tagged socket-chat_client:latest

real	0m1.589s
user	0m0.382s
sys	0m0.131s