Run flyway explicitly

src/main/java/com/petshop/backend/BackendApplication.java

@@ -1,6 +1,7 @@
 package com.petshop.backend;
 
-import org.springframework.boot.SpringApplication;
+import com.petshop.backend.config.FlywayContextInitializer;
+import org.springframework.boot.builder.SpringApplicationBuilder;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.data.web.config.EnableSpringDataWebSupport;
 
@@ -8,6 +9,8 @@ import org.springframework.data.web.config.EnableSpringDataWebSupport;
 @EnableSpringDataWebSupport(pageSerializationMode = EnableSpringDataWebSupport.PageSerializationMode.VIA_DTO)
 public class BackendApplication {
     public static void main(String[] args) {
-        SpringApplication.run(BackendApplication.class, args);
+        new SpringApplicationBuilder(BackendApplication.class)
+                .initializers(new FlywayContextInitializer())
+                .run(args);
     }
 }