Reduce Docker image size

[epicsoft]

Can we have a size optimized Docker image (e.g. based on alpine, with all non-functional stuff stripped out)?
A current Docker image size is x5 bigger compared to competitor solutions (cockroach, PostgreSQL,...).
A lightweight image should look more accessible, provide a shorter deployment time.

[bmatican]

Hey @epicsoft, thanks for your interest in Yugabyte! I definitely agree with you that a lighter docker image would come in quite handy!

We have definitely made some improvements in this area since our 1.0 release, but we can definitely go further. I believe our biggest win in this direction will be removing the debug information built into our libs. We have a task for integrating with Google Breakpad as per #927, which we expect will definitely help!

cc @mbautin

[linshenqi]

Any improvements? Now the image size is nearly 2GB