refactor: use lifecycle on start process

[fengmk2]

Checklist

• [ ] npm test passes
• [ ] tests and/or benchmarks are included
• [ ] documentation is changed or added
• [ ] commit message follows commit guidelines

Affected core subsystem(s)

Description of change

[codecov[bot]]

Codecov Report

Merging #10 into master will not change coverage. The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #10   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           5      5           
  Lines          28     29    +1     
=====================================
+ Hits           28     29    +1

Impacted Files	Coverage Δ
app.js	100% <100%> (ø)	:arrow_up:
agent.js	100% <100%> (ø)	:arrow_up:

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[fengmk2]

算 break 么？

[popomore]

应该不算吧