add tips on login page

[Baoyuantop]

Please answer these questions before submitting a pull request

Why submit this pull request?

• Bugfix
• New feature provided
• Improve performance
• Backport patches

Related issues
resolve #1488

[codecov-io]

Codecov Report

Merging #1491 (037d9fb) into master (65f792a) will increase coverage by 0.26%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1491      +/-   ##
==========================================
+ Coverage   68.43%   68.69%   +0.26%     
==========================================
  Files          48       48              
  Lines        3038     3038              
==========================================
+ Hits         2079     2087       +8     
+ Misses        720      712       -8     
  Partials      239      239              

Impacted Files	Coverage Δ
api/internal/core/store/store.go	87.95% <0.00%> (+1.20%)	⬆️
api/internal/core/storage/etcd.go	47.27% <0.00%> (+5.45%)	⬆️

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[juzhiyuan]

This is a Tip PR

[juzhiyuan]

@Baoyuantop Hi, could you please take some screenshots on Login page?

[Baoyuantop]

[juzhiyuan]

@Baoyuantop It could be more closer in a future PR :)

[Baoyuantop]

I will continue to improve in future PR