[ADD] Docker install and update instructions to README.md

[ppfeufer]

Description

Added

• Docker install and update instructions to README.md

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality not to work as expected)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented on my code, particularly in hard-to-understand areas
• I have checked my code and corrected any misspellings

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.33%. Comparing base (7e25858) to head (3e98375).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #203   +/-   ##
=======================================
  Coverage   65.33%   65.33%           
=======================================
  Files          12       12           
  Lines         323      323           
  Branches       28       28           
=======================================
  Hits          211      211           
  Misses        107      107           
  Partials        5        5           

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