Docker compose for Postgres and Spring Boot App [duplicate]

I am trying to dockerize my Spring boot application and a Postgres db by using a docker-compose like this:

version: "3"
  services:
    springapp:
      build: .
      container_name: springapp
      environment:
        SPRING_DATASOURCE_URL: jdbc:postgresql://local:5432/userdb
      ports:
        - 8080:8080
      restart: always
      depends_on:
        - db
    db:
      image: postgres
      container_name: db
      environment:
        - POSTGRES_USER=postgres
        - POSTGRES_PASSWORD=postgres
        - POSTGRES_DB=userdb
        - PGDATA=/var/lib/postgresql/data/pgdata
      ports:
        - 5432:5432
      volumes:
        - pgdata:/var/lib/postgresql/data
      restart: always
  volumes:
    pgdata:

My application.properties is this:

##connect to database
spring.datasource.driver-class-name=org.postgresql.Driver
spring.datasource.url=jdbc:postgresql://localhost:5432/userdb
spring.datasource.username=postgres
spring.datasource.password=postgres

##JPA config
spring.jpa.properties..hibernate.dialect = org.hibernate.dialect.PostgreSQLDialect
spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=false
spring.jpa.properties.hibernate.format_sql=true

#file config
spring.servlet.multipart.max-file-size=3MB
spring.servlet.multipart.max-request-size=3MB

My Dockerfile is this:

FROM openjdk:17-jdk-alpine
ARG  JAR_FILE=target/*.jar
COPY usermanager-0.0.1-SNAPSHOT.jar application.jar
ENTRYPOINT ["java", "-jar", "application.jar"]

When I try to use my application in local on sts I recieve this output;

2023-05-08 09:36:49.154  INFO 17436 --- [           main] c.u.a.u.UsermanagerApplication           : Starting UsermanagerApplication using Java 14.0.2 on VT-PastoreGu with PID 17436 (C:\Users\PastoreGu\eclipse-workspace\usermanager\target\classes started by PastoreGu in C:\Users\PastoreGu\eclipse-workspace\usermanager)
2023-05-08 09:36:49.158  INFO 17436 --- [           main] c.u.a.u.UsermanagerApplication           : No active profile set, falling back to 1 default profile: "default"
2023-05-08 09:36:50.092  INFO 17436 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2023-05-08 09:36:50.151  INFO 17436 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 49 ms. Found 1 JPA repository interfaces.
2023-05-08 09:36:50.589  INFO 17436 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2023-05-08 09:36:50.596  INFO 17436 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2023-05-08 09:36:50.596  INFO 17436 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.74]
2023-05-08 09:36:50.768  INFO 17436 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2023-05-08 09:36:50.768  INFO 17436 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1569 ms
2023-05-08 09:36:50.973  INFO 17436 --- [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [name: default]
2023-05-08 09:36:51.015  INFO 17436 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate ORM core version 5.6.15.Final
2023-05-08 09:36:51.132  INFO 17436 --- [           main] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2023-05-08 09:36:51.213  INFO 17436 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
2023-05-08 09:36:51.420  INFO 17436 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
2023-05-08 09:36:51.432  INFO 17436 --- [           main] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.PostgreSQLDialect
2023-05-08 09:36:51.975  INFO 17436 --- [           main] o.h.e.t.j.p.i.JtaPlatformInitiator       : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2023-05-08 09:36:51.987  INFO 17436 --- [           main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2023-05-08 09:36:52.745  WARN 17436 --- [           main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2023-05-08 09:36:53.141  INFO 17436 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2023-05-08 09:36:53.340  INFO 17436 --- [           main] c.u.a.u.UsermanagerApplication           : Started UsermanagerApplication in 4.517 seconds (JVM running for 5.403)

But When I try by using the command: docker-compose up I get error about not connection to the db:

org.postgresql.util.PSQLException: Connection to localhost:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.

How Can I solve it?