Improve docker image

[njam]

• Make the Quay build work
• Consider using a multi-stage build to reduce the image size
• Use local mirror code, instead of downloading from an archive
• Add usage notes to readme

@stephenh could you assign this to me?

[stephenh]

@njam I gave you push access to the repo so you can iterate without blocking on me. Thanks for working on this!

[njam]

Thanks! Could you verify the Quay build settings for me (I cannot access them)? I think the dockerfile path might be configured as /docker/Dockerfile there, while it should be just /Dockerfile. The most recent build failed with "Missing Dockerfile", while the build before moving the Dockerfile succeeded.

It should be:

• Dockerfile: "/Dockerfile"
• Context: "/"

[stephenh]

Ah yes, you're right. I changed the Dockerfile location to be just /Dockerfile. A build is running now.

[njam]

Everything is done here, and the Quay build works fine.