Update dev doc

[lucklove]

Fix #829

Check List

Tests

• No code

[codecov-io]

Codecov Report

Merging #837 into master will decrease coverage by 0.60%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #837      +/-   ##
==========================================
- Coverage   52.95%   52.35%   -0.61%     
==========================================
  Files         261      257       -4     
  Lines       18999    18847     -152     
==========================================
- Hits        10061     9867     -194     
- Misses       7378     7450      +72     
+ Partials     1560     1530      -30     

Flag	Coverage Δ
#cluster	44.73% <ø> (-0.06%)	⬇️
#dm	25.23% <ø> (+0.01%)	⬆️
#integrate	48.05% <ø> (+0.28%)	⬆️
#playground	22.17% <ø> (ø)
#tiup	?
#unittest	20.76% <ø> (ø)

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

Impacted Files	Coverage Δ
main.go	0.00% <0.00%> (-100.00%)	⬇️
cmd/env.go	23.07% <0.00%> (-69.24%)	⬇️
pkg/utils/args.go	0.00% <0.00%> (-50.00%)	⬇️
cmd/uninstall.go	34.54% <0.00%> (-43.64%)	⬇️
cmd/help.go	39.21% <0.00%> (-27.46%)	⬇️
cmd/list.go	12.97% <0.00%> (-25.96%)	⬇️
cmd/install.go	62.50% <0.00%> (-25.00%)	⬇️
cmd/status.go	8.10% <0.00%> (-18.92%)	⬇️
cmd/root.go	42.85% <0.00%> (-18.69%)	⬇️
cmd/clean.go	14.70% <0.00%> (-17.65%)	⬇️
... and 11 more

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[nrc]

lgtm

[lonng]

/merge

[ti-srebot]

Your auto merge job has been accepted, waiting for:

• 830

[ti-srebot]

/run-all-tests

[ti-srebot]

@lucklove merge failed.

[lonng]

Rest LGTM