$ docker build -t dockly .
Sending build context to Docker daemon  16.52MB
Step 1/9 : FROM node:8-alpine
8-alpine: Pulling from library/node
e6b0cf9c0882: Pull complete
93f9cf0467ca: Pull complete
a564402f98da: Pull complete
b68680f1d28f: Pull complete
Digest: sha256:38f7bf07ffd72ac612ec8c829cb20ad416518dbb679768d7733c93175453f4d4
Status: Downloaded newer image for node:8-alpine
 ---> 2b8fcdc6230a
[...snip...]
[1/5] Validating package.json...
[2/5] Resolving packages...
[3/5] Fetching packages...
[4/5] Linking dependencies...
warning "blessed-contrib > marked-terminal@1.7.0" has incorrect peer dependency "marked@^0.3.3".
[5/5] Building fresh packages...
Done in 12.14s.
Removing intermediate container b538567103be
 ---> 73affe941982
Step 9/9 : CMD ["node", "index.js"]
 ---> Running in 82ec51c50e49
Removing intermediate container 82ec51c50e49
 ---> 04b72f9f790c
Successfully built 04b72f9f790c
Successfully tagged dockly:latest