我最近开始学习Java和spring Boot ，我在youtube上看了一个关于如何构建一个小项目的教程，但是当它到了检查数据库连接的时候，我得到了这个消息：

customer=# \dt
Did not find any relations.

而且因为我对java和spring Boot 非常不熟悉，我发现自己在没有明确工作流程的情况下进行调试。如果有人能指引我正确的方向，我会非常感激。
下面是我的代码：

Main.java

package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;
import java.util.Objects;

@SpringBootApplication
@RestController
public class Main {
    public static void main(String[] args) {
        SpringApplication.run(Main.class, args);
    }

    @GetMapping("/")
    public GreetingResponse greeting(){
        GreetingResponse greetingString = new GreetingResponse(
                "Hello",
                List.of("Python", "Python", "Python"),
                new Person("Batool", 28, 500_000)
        );
        return greetingString;

    }

    record Person(String name, int age, double savings){

    }
    record GreetingResponse(
            String greeting,
            List<String> favProgrammingLanguages,
            Person person
    ){
    }

客户.java

import java.util.Objects;

import jakarta.persistence.*;
@Entity
public class Customer {
    @Id
    @SequenceGenerator(name = "customer_id_sequence", sequenceName = "customer_id_sequence")
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "customer_id_sequence")
    private Integer id;
    private String name;
    private String email;
    private Integer age;

    public Customer(Integer id, String name, String email, Integer age) {
        this.id = id;
        this.name = name;
        this.email = email;
        this.age = age;
    }

    public Integer getId() {
        return id;
    }

    public String getName() {
        return name;
    }
    public String getEmail() {
        return email;
    }

    public Integer getAge() {
        return age;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public void setName(String name) {
        this.name = name;
    }
    public void setEmail(String email) {
        this.email = email;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Customer customer = (Customer) o;
        return Objects.equals(id, customer.id) && Objects.equals(name, customer.name) && Objects.equals(email, customer.email) && Objects.equals(age, customer.age);
    }

    @Override
    public int hashCode() {
        return Objects.hash(id, name, email, age);
    }

    @Override
    public String toString() {
        return "Customer{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", email='" + email + '\'' +
                ", age=" + age +
                '}';
    }
}

docker-compose.yml

services:
  db:
    container_name: postgres
    image: postgres
    environment:
      POSTGRES_USER: <>
      POSTGRES_PASSWORD: <>
      PGDATA: /data/postgres
    volumes:
      - db:/data/postgres
    ports:
      - "5332:5432"
    networks:
      - db
    restart: unless-stopped

networks:
  db:
    driver: bridge

volumes:
  db:

application.yml

server:
  port: 8080

spring:
  datasource:
    platform: postgres
    driverClassName: org.postgresql.Driver
    url: jdbc:postgresql://db:5332/customer
    username: <>
    password: <>
  jpa:
    hibernate:
      ddl-auto: create-drop
    properties:
      hibernate:
        dialect: org.hibernate.dialect.PostgreSQLDialect
        format-sql: true
      show-sql: true
    main:
      web-development-type: servlet