docker_build_dockerfile

$ docker build -t mynodejsapp:1.0 .
Sending build context to Docker daemon 67.58 kB
Step 1/7 : FROM node:7
Trying to pull repository docker.io/library/node ... 
7: Pulling from docker.io/library/node
ad74af05f5a2: Pull complete 
2b032b8bbe8b: Pull complete 
a9a5b35f6ead: Pull complete 
3245b5a1c52c: Pull complete 
afa075743392: Pull complete 
9fb9f21641cd: Pull complete 
3f40ad2666bc: Pull complete 
49c0ed396b49: Pull complete 
Digest: sha256:af5c2c6ac8bc3fa372ac031ef60c45a285eeba7bce9ee9ed66dad3a01e29ab8d
Status: Downloaded newer image for docker.io/node:7
 ---> d9aed20b68a4
Step 2/7 : WORKDIR /app
 ---> aa0e530456b1
Removing intermediate container 5b17162f50b7
Step 3/7 : COPY package.json /app
 ---> d51305e482a2
Removing intermediate container 3c8818ef7f08
Step 4/7 : RUN npm install
 ---> Running in ca7c522f25a3

npm info it worked if it ends with ok
npm info using [email protected]
npm info using [email protected]
npm info lifecycle [email protected]~preinstall: [email protected]
npm info linkStuff [email protected]
npm info lifecycle [email protected]~install: [email protected]
npm info lifecycle [email protected]~postinstall: [email protected]
npm info lifecycle [email protected]~prepublish: [email protected]
npm info lifecycle [email protected]~prepare: [email protected]
npm info ok 
 ---> cf8f97db5f1f
Removing intermediate container ca7c522f25a3
Step 5/7 : COPY . /app
 ---> 65ec5a31946b
Removing intermediate container 5a2ba70f64f9
Step 6/7 : CMD node index.js
 ---> Running in 8c4ab44cf9e9
 ---> 3850e324092b
Removing intermediate container 8c4ab44cf9e9
Step 7/7 : EXPOSE 80
 ---> Running in 5c276c6f7d0b
 ---> 4ae33999e6b2
Removing intermediate container 5c276c6f7d0b
Successfully built 4ae33999e6b2