Add initial database migration script to create tables and seed data.

Add Dockerfile and docker-compose.yml for containerizing the Spring Boot application with PostgreSQL

src/main/java/com/jambotronGroup/jambotron/configuretions/FlyWayConfiguration.java

@@ -0,0 +1,27 @@
+package com.jambotronGroup.jambotron.configuretions;
+
+import lombok.RequiredArgsConstructor;
+import org.flywaydb.core.Flyway;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.env.Environment;
+
+@Configuration
+@RequiredArgsConstructor
+public class FlyWayConfiguration {
+
+    @Autowired
+    private Environment environment;
+
+    @Bean(initMethod = "migrate")
+    public Flyway flyway() {
+        return new Flyway(Flyway.configure()
+                .baselineOnMigrate(true)
+                .dataSource(
+                        environment.getRequiredProperty("flyway.url"),
+                        environment.getRequiredProperty("flyway.user"),
+                        environment.getRequiredProperty("flyway.password"))
+        );
+    }
+}

src/main/java/com/jambotronGroup/jambotron/configuretions/MvcConfig.java

@@ -1,4 +1,4 @@
-package com.jambotronGroup.jambotron;
+package com.jambotronGroup.jambotron.configuretions;
 
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Configuration;

src/main/java/com/jambotronGroup/jambotron/configuretions/NotFoundHandler.java

@@ -1,4 +1,4 @@
-package com.jambotronGroup.jambotron;
+package com.jambotronGroup.jambotron.configuretions;
 
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.http.HttpStatus;

src/main/java/com/jambotronGroup/jambotron/model/Tutorial.java

@@ -9,7 +9,7 @@ import jakarta.persistence.*;
 public class Tutorial {
 
 	@Id
-	@GeneratedValue(strategy = GenerationType.AUTO)
+	@GeneratedValue(strategy = GenerationType.IDENTITY)
 	private long id;
 
 	@Column(name = "title")

src/main/java/com/jambotronGroup/jambotron/model/User.java

@@ -18,7 +18,7 @@ import java.util.Set;
 		})
 public class User {
 	@Id
-	@GeneratedValue(strategy = GenerationType.AUTO)
+	@GeneratedValue(strategy = GenerationType.IDENTITY)
 	private long id;
 
     @Column(name = "username")