Add "How to Run a Tessera Log (MySQL)"

[roger2hk]

#21

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 35.24%. Comparing base (46ec9c2) to head (b70e969).
Report is 78 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #163      +/-   ##
==========================================
- Coverage   35.80%   35.24%   -0.57%     
==========================================
  Files          16       33      +17     
  Lines        1363     2880    +1517     
==========================================
+ Hits          488     1015     +527     
- Misses        801     1755     +954     
- Partials       74      110      +36     

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