feat(worker): only start one consumer and producer

[appleboy]

fix #8
fix #9

Signed-off-by: Bo-Yi Wu [email protected]

[codecov-commenter]

Codecov Report

Merging #10 (5275817) into main (16fc9ae) will increase coverage by 2.23%.
The diff coverage is 80.30%.

@@            Coverage Diff             @@
##             main      #10      +/-   ##
==========================================
+ Coverage   84.91%   87.15%   +2.23%     
==========================================
  Files           2        2              
  Lines         179      179              
==========================================
+ Hits          152      156       +4     
+ Misses         21       16       -5     
- Partials        6        7       +1     

Flag	Coverage Δ
go-1.13	87.15% <80.30%> (+2.23%)	⬆️
go-1.14	87.15% <80.30%> (+4.46%)	⬆️
go-1.15	87.15% <80.30%> (+4.46%)	⬆️
go-1.16	87.15% <80.30%> (+3.91%)	⬆️
go-1.17	87.15% <80.30%> (+2.23%)	⬆️
go-1.18	87.15% <80.30%> (+2.23%)	⬆️
ubuntu-latest	87.15% <80.30%> (+2.23%)	⬆️

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Impacted Files	Coverage Δ
nsq.go	82.96% <79.68%> (+0.52%)	⬆️
options.go	100.00% <100.00%> (+8.33%)	⬆️

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