Upgrade builder image to Go 1.17.0 (everything builds successfully with this version)
Switch to alpine for builder image (takes less space and less time to build; everything builds correctly and works on non-alpine Linux systems too - confirmed on openSUSE Tumbleweed)
Simplify builder Dockerfile significantly (no custom repos or compiler toolchains needed)
Upgrade to Alpine 3.14 for linux_amd64 image
I've confirmed that the above changes build successfully
Changes in this PR:
I've confirmed that the above changes build successfully