Normal docker build (not using modules) - image size is 775MB
docker build . -t go-sample-app-full
Optimized Build (with modules - image size is 389MB
docker build . -f Dockerfile.mod -t go-sample-app-modules
Multi-stage build (fully optimized) - image size is 16 MB
docker build . -f Dockerfile.multistage -t go-sample-app-multi