feat: setup github action for pr

[kimbyungnam]

Jenkins 인프라 불안정으로 인해 인프라 부담을 덜 방법으로 Github CI 사용도 가능할 것으로 보입니다

1. Base Image 로 Harbor 보다는 Public 공식 이미지를 사용하도록 변경
2. main branch pr 시 build, test, codecov, jib 수행하도록 action 추가

[codecov]

Codecov Report

Merging #65 (763fe98) into master (2ac2110) will decrease coverage by 13.81%.
The diff coverage is 35.37%.

@@              Coverage Diff              @@
##             master      #65       +/-   ##
=============================================
- Coverage     63.15%   49.33%   -13.82%     
- Complexity      262      329       +67     
=============================================
  Files            62       96       +34     
  Lines           741     1212      +471     
  Branches          4       26       +22     
=============================================
+ Hits            468      598      +130     
- Misses          259      597      +338     
- Partials         14       17        +3     

Impacted Files	Coverage Δ
...olab/gaonna/api/exception/BadRequestException.java	0.00% <0.00%> (ø)
...ption/OAuth2AuthenticationProcessingException.java	0.00% <0.00%> (ø)
...ab/gaonna/api/exception/QuestExceptionAdvisor.java	100.00% <ø> (ø)
...i/exception/validator/BboxConstraintException.java	100.00% <ø> (ø)
.../exception/OAuth2ProviderNotMatchingException.java	0.00% <0.00%> (ø)
...om/bbolab/gaonna/api/security/model/ErrorCode.java	0.00% <0.00%> (ø)
...com/bbolab/gaonna/api/security/model/JwtToken.java	0.00% <0.00%> (ø)
...ab/gaonna/api/security/model/OAuth2Attributes.java	0.00% <0.00%> (ø)
...i/security/model/provider/KakaoOAuth2UserInfo.java	0.00% <0.00%> (ø)
...i/security/model/provider/NaverOAuth2UserInfo.java	0.00% <0.00%> (ø)
... and 39 more

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