Connect docker container to spring boot app - postgresql

Question

I'm following a tutorial to create a mild spring boot application. I am running the IntelliJ community edition. I want to connect a docker container running Postgresql to the application. The idea is that there is a person database which has two tables for a name and id. I want to connect the person database with the spring boot app so I can run queries against it.
https://youtu.be/vtPkZShrvXQ?t=4309
I ran a docker-compose in terminal to create the container, then installed the docker extension on IntelliJ. I am new to this so please be patient. I am willing to redo if there are better approaches. I have attached source code for my controller, the link of the tutorial, an image of docker container running in IntelliJ, and an image of my docker-compose.yml file.
#RequestMapping("api/v1/person")
#RestController
public class PersonController {
private final PersonService personService;
#Autowired
public PersonController(PersonService personService) {
this.personService = personService;
}
#PostMapping
public void addPerson(#RequestBody Person person){
personService.addPerson(person);
}
#GetMapping
public List<Person> getAllPeople(){
return personService.getAllPeople();
}
#GetMapping(path="/{id}")
public Person getPersonById(#PathVariable("id") UUID id){
return personService.getPersonById(id)
.orElse(null);
}
#DeleteMapping(path="{id}")
public void deletePerson(#PathVariable("id") UUID id){
personService.deletePerson(id);
}
#PutMapping(path="{id}")
public void updatePerson(#PathVariable("id") UUID id, #RequestBody Person personToUpdate){
personService.updatePerson(id,personToUpdate);
}
}

Answer 1

You have to use Spring Data starter with postgres sql driver
Add following dependencies:
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
application.properties:
## default connection pool
spring.datasource.hikari.connectionTimeout=20000
spring.datasource.hikari.maximumPoolSize=5
## PostgreSQL
spring.datasource.url=jdbc:postgresql://localhost:5432/postgres
spring.datasource.username=postgres-spring
spring.datasource.password=password
#drop n create table again, good for testing, comment this in production
spring.jpa.hibernate.ddl-auto=create