add .env support

application.yaml

@@ -3,9 +3,9 @@ server:
 
 spring:
   datasource:
-    username: root
-    password: hRMH94dJ
-    url: jdbc:mysql://localhost:3306/search_engine?useSSL=false&requireSSL=false&allowPublicKeyRetrieval=true
+    username: ${DB_USER}
+    password: ${DB_PASSWORD}
+    url: ${DB_URL}
   jpa:
     hibernate:
       ddl-auto: update

pom.xml

@@ -45,5 +45,10 @@
             <version>8.4.0</version>
             <scope>runtime</scope>
         </dependency>
+        <dependency>
+            <groupId>me.paulschwarz</groupId>
+            <artifactId>spring-dotenv</artifactId>
+            <version>4.0.0</version>
+        </dependency>
     </dependencies>
 </project>