Fix: develop에 대한 pull_request 조건 추가 (#63)

develop에 대한 closed된 pull request를 조건으로 추가
jobs 안에 if를 이용해 push event이거나 pull_request event면서 merge가 true인 경우만 동작하도록 함

.github/workflows/gradle.yml

@@ -4,13 +4,15 @@ on:
   push:
     branches: [ "develop" ]
   pull_request:
-    branches: [ ]
+    branches: [ "develop" ]
+    types: [ closed ]
 
 permissions:
   contents: read
 
 jobs:
   build:
+    if: github.event_name == 'push' || (github.event_name == 'pull_request' && github.event.pull_request.merged == true)
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
@@ -31,6 +33,7 @@ jobs:
           AIPROMPT_LULU: ${{ secrets.AIPROMPT_LULU }}
 
   docker-build:
+    if: github.event_name == 'push' || (github.event_name == 'pull_request' && github.event.pull_request.merged == true)
     runs-on: ubuntu-latest
     needs: build
     steps: