Fix: adding setting up postgresql step in ci-cd.yml

Error Message:
BlogueApplicationTests > contextLoads() FAILED
    java.lang.IllegalStateException at DefaultCacheAwareContextLoaderDelegate.java:180
        Caused by: org.springframework.beans.factory.BeanCreationException at AbstractAutowireCapableBeanFactory.java:1786
            Caused by: org.hibernate.service.spi.ServiceException at AbstractServiceRegistryImpl.java:276
                Caused by: org.hibernate.HibernateException at DialectFactoryImpl.java:191

.github/workflows/ci-cd.yml

@@ -18,6 +18,13 @@ jobs:
       with:
         distribution: 'corretto'
         java-version: '17'
+
+    - name: Set up PostgreSQL
+      uses: Daniel-Marynicz/[email protected]
+      with:
+        postgres_user: ${{ secrets.DB_USER }}
+        postgres_db: ${{ secrets.DB_NAME }}
+        postgres_password: ${{ secrets.DB_PASSWORD }}
 
     - name: Build with Gradle
       run: ./gradlew build