fix(ci): must set mysql root password

[aldy505]

No description provided.

[codecov]

Codecov Report

Patch coverage: 59.19% and project coverage change: -38.37% ⚠️

Comparison is base (f5b008b) 100.00% compared to head (2f6c360) 61.63%.
Report is 4 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##            master      #19       +/-   ##
============================================
- Coverage   100.00%   61.63%   -38.37%     
============================================
  Files            4        7        +3     
  Lines           30      503      +473     
============================================
+ Hits            30      310      +280     
- Misses           0      146      +146     
- Partials         0       47       +47     

Files Changed	Coverage Δ
underattack/datastore/postgres/postgres.go	58.12% <58.12%> (ø)
underattack/datastore/mysql/mysql.go	58.93% <58.93%> (ø)
underattack/datastore/memory/memory.go	63.49% <63.49%> (ø)

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