chore: datasource 연결 정보 분리

- 환경 변수로 값 주입되도록 구현

Author: ysw789

src/main/resources/application-credentials.yml

@@ -0,0 +1,13 @@
+spring:
+  datasource:
+    url: ${DB_URL}
+    driver-class-name: oracle.jdbc.OracleDriver
+    username: ${DB_USERNAME}
+    password: ${DB_PASSWORD}
+  jpa:
+    hibernate:
+      ddl-auto: ${DDL_AUTO}
+    show-sql: ${SHOW_SQL}
+    properties:
+      hibernate:
+        dialect: org.hibernate.dialect.OracleDialect

src/main/resources/application.yml

@@ -3,12 +3,3 @@ server:
 spring:
   application:
     name: dasom-api
-  datasource:
-    url: ${DB_URL}
-    driver-class-name: oracle.jdbc.OracleDriver
-    username: ${DB_USERNAME}
-    password: ${DB_PASSWORD}
-  jpa:
-    hibernate:
-      ddl-auto: update
-    show-sql: true