Redundant command line parameter

[arun-gupta]

Current instructions to run Amplify image are:

docker run --name mynginx1 -e API_KEY=ecfdee2e010899135c258d741a6effc7 -d nginx-amplify

After #2 is fixed, then -e API_KEY may not be required since the key is specified in the Dockerfile.

[cdarwin]

Documentation and Dockerfile have been updated to recommend setting API_KEY at runtime rather than in the image. You could still set this in your own base image if you manage access to and trust your own registry, but we will not be doing so in our public builds.

Thanks!