Simplify setup with make and new inventory file

[jgwerner]

• Add makefile to consolidate commands for local setup and deployment
• Update Readme with new instructions

[codecov]

Codecov Report

Merging #8 into master will not change coverage by %.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master       #8   +/-   ##
=======================================
  Coverage   54.83%   54.83%           
=======================================
  Files           5        5           
  Lines         341      341           
=======================================
  Hits          187      187           
  Misses        154      154           

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