Deploy Sprint Boot And Postegres on Render with Web Services and Docker

Creat Spring Boot Project

https://start.spring.io/

Add Dependencies Web : spring-boot-starter-web

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

Add Dependencies JPA

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

Add Dependencies PostegreSql : postgresql

<dependency>
    <groupId>org.postgresql</groupId>
    <artifactId>postgresql</artifactId>
    <scope>runtime</scope>
</dependency>

Create Dockerfile at the root folder

#
# Build stage
#
FROM maven:3.8.2-jdk-11 AS build
COPY . .
RUN mvn clean package -Pprod -DskipTests

#
# Package stage
#
FROM openjdk:11-jdk-slim
COPY --from=build /target/demo-0.0.1-SNAPSHOT.jar demo.jar
# ENV PORT=8080
EXPOSE 8080
ENTRYPOINT ["java","-jar","demo.jar"]

Building a Dockerfile from the root folder

By default docker uses the Dockerfile of the current folder if you run a single command like
Run: docker build -t spring-boot-render .

Run image with docker on localhost

Run docker run -p 8080:8080 spring-boot-render

Create Postegres database from Render.com

https://dashboard.render.com/

Modify connections params on application.properties

server.tomcat.accesslog.enabled=true

spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.PostgreSQLDialect
spring.jpa.hibernate.ddl-auto=update
spring.jpa.hibernate.show-sql=true

spring.datasource.url=jdbc:postgresql://dpg-{custom-url}.render.com:5432/{name_database}
spring.datasource.username=your_username
spring.datasource.password=your_passeword
spring.datasource.driver-class-name=org.postgresql.Driver

Creat new Web Service app

DEMO