Fix image for 427-e+

[jefflester]

Starting with 427-e, Starburst's Docker image has removed many of the binaries that were previously included. Some of the packages include:

• sed
• grep
• curl
• python

Since the SEP base image no longer has a package manager, we can consider building a Docker image that downloads the SEP tarball and installs it, then configures the image as needed. This method should be somewhat extensible between previous and future SEP releases.

[jefflester]

Closed with #69