fixed: optimize the local operation mode and add custom agentport and center server

[alonelucky]

fixed goc run --agentport --center invalid

1. --agenport You can customize the port number
2. --center You can customize the central service.
   If not specified, the default behavior is maintained

修复 goc run --agentport --center指定无效
如果不指定, 保持默认行为, 随机端口

#226

[codecov]

Codecov Report

Merging #228 (18f7e76) into master (b305d13) will decrease coverage by 0.14%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #228      +/-   ##
==========================================
- Coverage   71.49%   71.35%   -0.15%     
==========================================
  Files          34       34              
  Lines        2003     2007       +4     
==========================================
  Hits         1432     1432              
- Misses        465      469       +4     
  Partials      106      106              

Flag	Coverage Δ
e2e-1.11.x	?
e2e-1.12.x	?
e2e-1.13.x	?
e2e-1.14.x	?
e2e-1.15.x	?
e2e-1.16.x	?
unittest-1.13.x	71.15% <0.00%> (-0.15%)	⬇️
unittest-1.14.x	71.25% <0.00%> (-0.15%)	⬇️
unittest-1.15.x	71.15% <0.00%> (-0.15%)	⬇️
unittest-1.16.x	71.25% <0.00%> (-0.15%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cmd/run.go	6.25% <0.00%> (-0.57%)	⬇️

[qiniu-bot]

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This pull-request has been approved by: alonelucky, lyyyuna

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