create project

https://start.spring.io/

login docker

docker login

Build Docker (Normal)

build docker image

docker build -t {image name} . e.g. docker build -t springboot-koltin-gradle .

run docker image at local

docker run -p 8080:8080 {image name} e.g. docker run -p 8080:8080 springboot-koltin-gradle

Build docker image (other option)

e.g. docker build -t cho17bee2/springboot-koltin-gradle:latest .

run docker image at local

e.g. docker run -p 8080:8080 cho17bee2/springboot-koltin-gradle:latest

on browser

http://localhost:8080/api/hello

tag docker image

docker tag {image name} {Repositories}/{image name}:{tag name} e.g. docker tag springboot-koltin-gradle cho17bee2/springboot-koltin-gradle:latest

push the image to hub

docker push e.g. docker push cho17bee2/springboot-koltin-gradle:latest

after deploy to render

https://springboot-koltin-gradle-latest.onrender.com/api/hello