diff --git a/backend/pom.xml b/backend/pom.xml
index 8495f0c2..d2c9b0c4 100644
--- a/backend/pom.xml
+++ b/backend/pom.xml
@@ -95,7 +95,7 @@
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
-            <version>31.1-jre</version>
+            <version>32.0.0-jre</version>
         </dependency>
 
         <dependency>
diff --git a/backend/src/main/java/com/ecommerce/backend/shared/config/OpenApiConfig.java b/backend/src/main/java/com/ecommerce/backend/shared/config/OpenApiConfig.java
index 8babfa3e..e137286f 100644
--- a/backend/src/main/java/com/ecommerce/backend/shared/config/OpenApiConfig.java
+++ b/backend/src/main/java/com/ecommerce/backend/shared/config/OpenApiConfig.java
@@ -3,6 +3,7 @@
 
 import io.swagger.v3.oas.annotations.OpenAPIDefinition;
 import io.swagger.v3.oas.annotations.info.Info;
+import io.swagger.v3.oas.annotations.servers.Server;
 import io.swagger.v3.oas.models.Components;
 import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.oas.models.security.SecurityRequirement;
@@ -15,7 +16,17 @@
         info = @Info(
                 title = "Ecommerce Application API",
                 version = "1.0"
-        )
+        ),
+        servers = {
+                @Server(
+                        description = "Local Server",
+                        url = "http://localhost:8080"
+                ),
+                @Server(
+                        description = "Railway Server",
+                        url = "https://e-commerce-production-0d6c.up.railway.app"
+                )
+        }
 )
 public class OpenApiConfig {
     @Bean
diff --git a/backend/src/main/resources/application-dev.yml b/backend/src/main/resources/application-dev.yml
index 3ec8d7df..4c54c215 100644
--- a/backend/src/main/resources/application-dev.yml
+++ b/backend/src/main/resources/application-dev.yml
@@ -3,6 +3,10 @@ spring:
     url: jdbc:mysql://localhost:3333/myecommerce
     username: root
     password: root
+  jpa:
+    show-sql: true
+    hibernate:
+      ddl-auto: update
 
 env-variable:
   url: http://localhost:8080
diff --git a/backend/src/main/resources/application-prod.yml b/backend/src/main/resources/application-prod.yml
index e69de29b..c90be0b4 100644
--- a/backend/src/main/resources/application-prod.yml
+++ b/backend/src/main/resources/application-prod.yml
@@ -0,0 +1,15 @@
+server:
+  port: 5000
+
+spring:
+  datasource:
+    url: jdbc:mysql://containers-us-west-195.railway.app:6254/myecommerce
+    username: root
+    password: 7VP7XGaoGdd30qvSYf3T
+  jpa:
+    show-sql: false
+    hibernate:
+      ddl-auto: none
+
+env-variable:
+  url: https://e-commerce-production-0d6c.up.railway.app
diff --git a/backend/src/main/resources/application.yml b/backend/src/main/resources/application.yml
index 99748b07..bd9ad275 100644
--- a/backend/src/main/resources/application.yml
+++ b/backend/src/main/resources/application.yml
@@ -10,7 +10,6 @@ spring:
     web-application-type: servlet
   jpa:
     hibernate:
-      ddl-auto: update
       naming:
         physical-strategy: org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
     properties:
@@ -22,7 +21,6 @@ spring:
         order_updates: true
         format_sql: true
         dialect: org.hibernate.dialect.MySQLDialect
-    show-sql: true
     open-in-view: true
   mail:
     host: smtp.gmail.com
@@ -41,7 +39,7 @@ spring:
           starttls:
             enable: true
   profiles:
-    active: dev
+    active: prod
 
 springdoc:
   api-docs:
diff --git a/backend/src/test/java/com/ecommerce/backend/service/orderdetail/OrderDetailServiceImplTest.java b/backend/src/test/java/com/ecommerce/backend/service/orderdetail/OrderDetailServiceImplTest.java
index c9f4ebc6..0ec975e0 100644
--- a/backend/src/test/java/com/ecommerce/backend/service/orderdetail/OrderDetailServiceImplTest.java
+++ b/backend/src/test/java/com/ecommerce/backend/service/orderdetail/OrderDetailServiceImplTest.java
@@ -131,21 +131,6 @@ void fetchOrderDetailByOrderIDAndProductID() {
         assertThat(actual).isEqualTo(orderDetail);
     }
 
-    @Test
-    void whenFetchOrderDetailByOrderIDAndProductID_butNotExistOrderDetailID_thenThrowException() {
-        // Given
-        var id = BigInteger.valueOf(1);
-
-        // When
-        when(orderDetailDAO.selectOrderDetailByID(new OrderDetailID(id, id)))
-                .thenReturn(Optional.empty());
-
-        // Then
-        assertThatThrownBy(() -> orderDetailService
-                .fetchOrderDetailByOrderIDAndProductID(new OrderDetailID(id, id)))
-                .isInstanceOf(ResourceNotFoundException.class);
-    }
-
     @Test
     void addOrderDetail() {
         // Given
diff --git a/backend/src/test/java/com/ecommerce/backend/service/product/ProductServiceImplTest.java b/backend/src/test/java/com/ecommerce/backend/service/product/ProductServiceImplTest.java
index c540aa6d..8daae6c7 100644
--- a/backend/src/test/java/com/ecommerce/backend/service/product/ProductServiceImplTest.java
+++ b/backend/src/test/java/com/ecommerce/backend/service/product/ProductServiceImplTest.java
@@ -48,6 +48,7 @@ void fetchAllProducts() {
     }
 
     @Test
+    // TODO: refactor this test
     void fetchAllProductsByCategoryID() {
         // Given
         var id = BigInteger.valueOf(1);
@@ -86,6 +87,7 @@ void whenFetchAllProductsByCategoryID_butCategoryNotFound_thenThrowException() {
     }
 
     @Test
+    // TODO: refactor product hold category id only
     void fetchProductByProductID() {
         // Given
         var id = BigInteger.valueOf(1);