I am trying to dockerize my spring boot application with postgresql. And i managed to do that. But there is a problem. Since i configure my datasource url in application.properties for dockerizing, everytime when i try to mvn clean install , it fails. Because the application cannot access to given url on build stage.

Here is the mentioned part of application.properties for better understanding :

spring.datasource.url=jdbc:postgresql://e-bank-db:5432/e-bank

Also in my Dockerfile when the images created for the first time (i mean when i docker-compose build from zero) , i must skip the test when packaging maven. Otherwise, it is failing too.

Here is my Dockerfile :

FROM openjdk:17-slim AS build
COPY pom.xml mvnw ./
COPY .mvn .mvn
RUN
./mvnw dependency:resolve
COPY src src
RUN ./mvnw package
-DskipTests=true
FROM openjdk:17-slim
WORKDIR e-bank
COPY –from=build target/*.jar e-bank.jar
ENTRYPOINT [“java”, “-jar”, “e-bank.jar”]

And here is my docker-compose.yaml :

version: '3.8'
services:
  e-bank-db:
    container_name: e-bank-db
    image: postgres
    restart: always
    environment:
      - POSTGRES_USER=username
      - POSTGRES_PASSWORD=password
      - POSTGRES_DB=e-bank
    ports:
      - '5432:5432'
    volumes:
      - e-bank_db:/var/lib/e-bank-postgresql/data
  e-bank-app:
    container_name: e-bank-app
    image: e-bank
    build: .
    ports:
      - '8080:8080'
    depends_on:
      - e-bank-db
volumes:
  e-bank_db:
    driver: local 

I am new to docker. And i would appreciate if someone explains this confusing story. Thank you.