diff --git a/docker-spring-boot/Dockerfile b/docker-spring-boot/Dockerfile
index fe5b723..cd9fd99 100644
--- a/docker-spring-boot/Dockerfile
+++ b/docker-spring-boot/Dockerfile
@@ -2,7 +2,7 @@
 # FROM openjdk:8-jdk-alpine
 
 # For Java 11, try this
-FROM adoptopenjdk/openjdk11:alpine-jre
+FROM adoptopenjdk/openjdk11
 
 # Refer to Maven build -> finalName
 ARG JAR_FILE=target/spring-boot-web.jar
@@ -18,4 +18,4 @@ ENTRYPOINT ["java","-jar","app.jar"]
 
 ## sudo docker run -p 8080:8080 -t docker-spring-boot:1.0
 ## sudo docker run -p 80:8080 -t docker-spring-boot:1.0
-## sudo docker run -p 443:8443 -t docker-spring-boot:1.0
\ No newline at end of file
+## sudo docker run -p 443:8443 -t docker-spring-boot:1.0
diff --git a/docker-spring-boot/readme.md b/docker-spring-boot/readme.md
index 02c54e4..d3f5e78 100644
--- a/docker-spring-boot/readme.md
+++ b/docker-spring-boot/readme.md
@@ -11,8 +11,12 @@ Tested with
 For explanation, please visit this article - [Docker and Spring Boot](https://mkyong.com/docker/docker-spring-boot-examples/)
 
 ## How to run this?
+## make sure DOCKER_DEFAULT_PLATFORM is not set
 ```bash
-$ git clone https://github.com/mkyong/docker-java
+$ 
+$ export DOCKER_DEFAULT_PLATFORM=
+$ git clone https://github.com/ragsns/docker-java
+$ sdk install java 11.0.21-amzn // make it default
 $ cd docker-spring-boot
 $ mvn clean package
 $ java -jar target/spring-boot-web.jar
@@ -23,8 +27,19 @@ $ java -jar target/spring-boot-web.jar
 
 // create a docker image
 $ sudo docker build -t spring-boot:1.0 .
+// for multi-arch
+// if necessary install buildx as below on gitpod
+// from https://github.com/docker/buildx/releases/tag/v0.11.2
+// or as below
+$ cp buildx-v0.11.2.darwin-amd64 
+$ docker login // login to docker or any other registry
+$ docker buildx bake "https://github.com/docker/buildx.git"
+$ docker buildx create --name mybuilder --use --bootstrap // one time only
+$ docker buildx build --no-cache \
+--push \
+--platform linux/arm/v7,linux/arm64/v8,linux/amd64 --tag ragsns/spring-boot-multi .
 // run it
 $ sudo docker run -d -p 8080:8080 -t spring-boot:1.0
 
   access http://localhost:8080
-```
\ No newline at end of file
+```