You could try to apply the techniques here to further reduce the final binary size: https://github.com/johnthagen/min-sized-rust

At a minimum, striping the binary should reduce the size significantly without any real cost: https://github.com/johnthagen/min-sized-rust#strip-symbols-from-binary

Travis CI have changed their plans, so the CI tests do not run for the project (and they are displaying in the Github repo as 'failed', but they just don't run because there are not enough credits on the account). In this patch I have added the correct badge from circleci (you just need to create a free account there and link it with Github). The task I have ported to circleci system and tested (see https://circleci.com/gh/parasew/mini-docker-rust/tree/main.svg?style=svg )

This patch has two small updates:

1. Update to a easier to read Rust version number (from rust:1-alpine3.13 to 1.57-alpine)
2. Updated Rust to 1.57
3. Alpine Linux 3.15 update

With the changes, the container size is 6.01MB.

Hi!

Docker features multi-stage builds nowadays: https://docs.docker.com/develop/develop-images/multistage-build/

This pretty much lets you create a temporary build image, then copy an artifact from the build image over to your actual target image, all in one Dockerfile. Have you considered that approach? I got the same size from that, but I feel the Dockerfile is "cleaner".

tom@tomian:~/code/mini-docker-rust$ docker image ls
REPOSITORY              TAG                 IMAGE ID            CREATED              SIZE
mdrr                    latest              6dbc2cd0676e        11 seconds ago       7.52MB
mdr                     latest              0f65f756e698        9 minutes ago        7.52MB
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