Add 'target' parameter support for multi stage builds

[antonsamoilik]

Hello,

Docker has a wonderful feature to create multi-stage builds however the plugin does not support this. Can you please add 'target' parameter into build task so that feature can be used?

Thank you

[saurin-tech]

Hi,

I'm relatively new to the whole containerizing solution and all. But I came across the multi-stage build and wondered the same thing. I was following the guide to create a docker container.

The only change I've made from the guide was that to utilize base image of openjdk:8-jre-alpine . I believe you do not need to do the multi-stage build because you already are utilizing only jre to run your container and not the entire jdk. Also the gradlew docker build command builds a bootJar before hand and inserts that in to the container.

With just a simple spring boot rest controller that returns hello world my image size is only 98.1MB. I think this is pretty darn small.

Someone should step in and correct me if I've got any of the above wrong.

Thanks