fix: modify webpack-dev-server port

[xiaoyuhen]

No description provided.

[codecov-io]

Codecov Report

Merging #5 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master       #5   +/-   ##
=======================================
  Coverage   53.16%   53.16%           
=======================================
  Files         123      123           
  Lines        1657     1657           
=======================================
  Hits          881      881           
  Misses        776      776

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