add docker architecture to readme

[williambrandler]

Signed-off-by: William Brandler william.brandler@databricks.com

What changes are proposed in this pull request?

adding in the architecture for docker to make it easier to understand how to build a container and edit it

How is this patch tested?

• rendered image in chrome browser using markdown preview plus chrome extension

[codecov[bot]]

Codecov Report

Merging #502 (31a5049) into master (8e8ba36) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #502   +/-   ##
=======================================
  Coverage   93.66%   93.66%           
=======================================
  Files          95       95           
  Lines        4875     4875           
  Branches      457      457           
=======================================
  Hits         4566     4566           
  Misses        309      309           

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