from the dockerfile there is this go build line

CGO_ENABLED=0 GOOS=linux GOARCH=amd64 \
    go build -ldflags="-s -w" -o wstcproxy ./cmd/main.go

try to add the gu build flags for windows
env GOOS=windows GOARCH=386

Im afraid only Ubuntu20 is suported to run a lite-server in an easy way
Please follow this tutorial

https://github.com/ton-blockchain/mytonctrl/blob/master/docs/en/manual-ubuntu.md