Add Appendix: Instructions for manual testing

[codecov[bot]]

Codecov Report

Merging #270 (9070d88) into master (5467767) will not change coverage. Report is 3 commits behind head on master. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #270   +/-   ##
=========================================
  Coverage     69.87%   69.87%           
  Complexity      564      564           
=========================================
  Files            94       94           
  Lines          1882     1882           
  Branches        214      214           
=========================================
  Hits           1315     1315           
  Misses          490      490           
  Partials         77       77           

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[RB9823]

LGTM