ADD step copies local node_modules to the container

[Guuz]

Hello,

On line 6 of the dockerfile (https://github.com/GoogleCloudPlatform/nodejs-docker/blob/master/runtime/Dockerfile#L6) the local app files are added to the container. In the steps before the right node_module folder has been created.
But the step on line 6 will copy your (dirty) local node_modules over the (clean) container node_modules.
This is very bad for so many reasons! ;-)

ps. i'm using managed vm's with custom runtimes; a .dockerignore file does not work.
ps2. I accidentally also posted this issue at the docker repository github page. But this is actually relevant for both. See dockerfile/nodejs-runtime#2

[proppy]

@Guuz you might want to report the same issue here: https://github.com/docker-library/node/

[JustinBeckwith]

I believe this is addressed. Feel free to re-open if this is still an issue.