Shrink release builds

[maniac-en]

Goal

Build stripped binaries, and shrink them more with help of upx

Quick test locally for v0.1.0-alpha.3

13M     req-released-binary
7.8M	req-stripped-binary
2.5M	req-stripped-binary-upxed

TODO

• Update GH workflow to build stripped binary for each platform
• Incorporate upx's GH action as part of release build process

Ref:

• https://words.filippo.io/shrink-your-go-binaries-with-this-one-weird-trick/
• https://github.com/marketplace/actions/upx-github-action