[skip ci] Dockerize section, how to handle different Dockerfile stages

doc/dev_notes.md

@@ -39,6 +39,43 @@ build graalvm binary
     curl -X GET localhost:8080 
 2. graalvm native-image compilation
     ./gradlew nativeCompile -Dvaadin.productionMode=true //-H:ConfigurationFileDirectories=/path/to/config-dir/ notwendig falls nicht in src/main/resources/META-INF/native-image/
+```
+
+```
+Dockerizing -> image/Dockerfile  
+
+install buildx-plugin by binary to use build-native-stage only with DOCKER_BUILDKIT:  
+- https://github.com/docker/buildx/releases/download/v0.15.1/buildx-v0.15.1.linux-amd64
+- sha256sum buildx-v0.15.1.linux-amd64
+- move to file: mv buildx-v0.15.1.linux-amd64 $HOME/.docker/cli-plugins/docker-buildx  
+- chmod x $HOME/.docker/cli-plugins/docker-buildx 
+
+further:  
+    It could be either build jar file or graalvm binary  
+    
+    (1)build-jar-stage  
+    docker build --tag=meapp-jar --target=build-jar-stage .
+    (2)ENTRYPOINT as run-jar-stage
+    docker build --tag=run-meapp-jar --target=run-jar-stage
+    
+    (3)build-native-stage  
+    DOCKER_BUILDKIT=1 docker build --tag=meapp-native --target= build-native-stage .
+    (4)ENTRYPOINT as run-native-stage
+    DOCKER_BUILDKIT=1 docker build --tag=meapp-run-native --target=run-native-stage .
+    
+Test images:  
+    docker run -e MEMBERNAMES=er,sie,es -p 8080:8080 run-jar-stage:latest
+    docker run -e MEMBERNAMES=er,sie,es -p 8080:8080 run-native-stage:latest
+
+Buildkit caching:
+    export DOCKER_BUILDKIT=1
+    --build-arg BUILDKIT_INLINE_CACHE=1
+    (1)docker build --tag=meapp-jar --target=build-jar-stage --build-arg BUILDKIT_INLINE_CACHE=1 .
+    (2)docker build --tag=meapp-run-jar --target=run-jar-stage --build-arg BUILDKIT_INLINE_CACHE=1 .
+    (3)docker build --tag=meapp-native --target=build-native-stage --build-arg BUILDKIT_INLINE_CACHE=1 .
+    (4)docker build --tag=meapp-run-native --target=run-native-stage --build-arg BUILDKIT_INLINE_CACHE=1 .
+
+
 
 ```