⬆️ Run `martini` with Go-1.19, Go modules and `GOAMD64=v3` (#7602)
* ⬆️ Bump Go from 1.14 to 1.19 (Dockerfile)
* ♻️ Use Go module
* ⚡️ Set GOAMD64=v3 for AVX2, SSE4.2… instructions
See https://github.com/golang/go/wiki/MinimumRequirements#amd64
* ✨ Use Go modules (`go.mod`)
* 💚 Use Debian-based image (no Alpine) to use GCC