메서드에 주석 작업 및 코드 정리

[JHyeok]

What is this PR? 🔍

• 메서드에 주석 작업 및 코드 정리

Changes 📝

• 메서드에 주석 작업 및 코드 정리
• README.md 수정

Screenshot 📷

[codecov]

Codecov Report

Merging #10 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #10   +/-   ##
=======================================
  Coverage   97.98%   97.98%           
=======================================
  Files          31       31           
  Lines         597      597           
  Branches       46       46           
=======================================
  Hits          585      585           
  Misses         12       12           

Impacted Files	Coverage Δ
src/dtos/PostCommentDto.ts	100.00% <ø> (ø)
src/dtos/PostDto.ts	100.00% <ø> (ø)
src/dtos/UserDto.ts	100.00% <ø> (ø)
src/env.ts	100.00% <ø> (ø)
src/middlewares/ErrorMiddleware.ts	50.00% <ø> (ø)
src/repositories/PostCommentRepository.ts	100.00% <ø> (ø)
src/repositories/PostRepository.ts	100.00% <ø> (ø)
src/services/AuthService.ts	100.00% <ø> (ø)
src/services/PostCommentService.ts	100.00% <ø> (ø)
src/services/PostLikeService.ts	100.00% <ø> (ø)
... and 3 more

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