Have you ever waited a long time to push a docker image of a golang application to a docker hub or other container registry ? If yes, then this article may be useful for you.
The idea is to reduce the image size. We can do that with a multi-stage build. First we will need a golang image to build the code and the output will be a binary. And then for the next stage we will need an scratch image and copy the binary from the first build.
This is the code example of a golang application.
And this is the dockerfile without multi-stage build.
The size of this image is 921MB.
And this is the new dockerfile with multi-stage build.
The size of this image is 1.94MB.
