Add deployment section to README

[david-mears-2]

Added a section on deployment

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.27%. Comparing base (d8d9bdf) to head (ffa4007).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #265   +/-   ##
=======================================
  Coverage   99.27%   99.27%           
=======================================
  Files         205      205           
  Lines        5947     5947           
  Branches     1005     1005           
=======================================
  Hits         5904     5904           
  Misses         42       42           
  Partials        1        1           

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